unix: follow convention for generated code comment

Follow the convertion (https://golang.org/s/generatedcode) for generated
code.

Change-Id: I27899b24366d5c0d2c5574b5eaf3d7e0babc8909
Reviewed-on: https://go-review.googlesource.com/118820
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

unix/mksysctl_openbsd.pl

@@ -240,7 +240,7 @@ foreach my $header (@headers) {
 
 print <<EOF;
 // mksysctl_openbsd.pl
-// MACHINE GENERATED BY THE ABOVE COMMAND; DO NOT EDIT
+// Code generated by the command above; DO NOT EDIT.
 
 // +build $ENV{'GOARCH'},$ENV{'GOOS'}
 

unix/zerrors_linux_386.go

@@ -3,7 +3,7 @@
 
 // +build 386,linux
 
-// Created by cgo -godefs - DO NOT EDIT
+// Code generated by cmd/cgo -godefs; DO NOT EDIT.
 // cgo -godefs -- -Wall -Werror -static -I/tmp/include -m32 _const.go
 
 package unix

unix/zerrors_linux_amd64.go

@@ -3,7 +3,7 @@
 
 // +build amd64,linux
 
-// Created by cgo -godefs - DO NOT EDIT
+// Code generated by cmd/cgo -godefs; DO NOT EDIT.
 // cgo -godefs -- -Wall -Werror -static -I/tmp/include -m64 _const.go
 
 package unix

unix/zerrors_linux_arm.go

@@ -3,7 +3,7 @@
 
 // +build arm,linux
 
-// Created by cgo -godefs - DO NOT EDIT
+// Code generated by cmd/cgo -godefs; DO NOT EDIT.
 // cgo -godefs -- -Wall -Werror -static -I/tmp/include _const.go
 
 package unix

unix/zerrors_linux_arm64.go

@@ -3,7 +3,7 @@
 
 // +build arm64,linux
 
-// Created by cgo -godefs - DO NOT EDIT
+// Code generated by cmd/cgo -godefs; DO NOT EDIT.
 // cgo -godefs -- -Wall -Werror -static -I/tmp/include -fsigned-char _const.go
 
 package unix

unix/zerrors_linux_mips.go

@@ -3,7 +3,7 @@
 
 // +build mips,linux
 
-// Created by cgo -godefs - DO NOT EDIT
+// Code generated by cmd/cgo -godefs; DO NOT EDIT.
 // cgo -godefs -- -Wall -Werror -static -I/tmp/include _const.go
 
 package unix

unix/zerrors_linux_mips64.go

@@ -3,7 +3,7 @@
 
 // +build mips64,linux
 
-// Created by cgo -godefs - DO NOT EDIT
+// Code generated by cmd/cgo -godefs; DO NOT EDIT.
 // cgo -godefs -- -Wall -Werror -static -I/tmp/include _const.go
 
 package unix

unix/zerrors_linux_mips64le.go

@@ -3,7 +3,7 @@
 
 // +build mips64le,linux
 
-// Created by cgo -godefs - DO NOT EDIT
+// Code generated by cmd/cgo -godefs; DO NOT EDIT.
 // cgo -godefs -- -Wall -Werror -static -I/tmp/include _const.go
 
 package unix

unix/zerrors_linux_mipsle.go

@@ -3,7 +3,7 @@
 
 // +build mipsle,linux
 
-// Created by cgo -godefs - DO NOT EDIT
+// Code generated by cmd/cgo -godefs; DO NOT EDIT.
 // cgo -godefs -- -Wall -Werror -static -I/tmp/include _const.go
 
 package unix

unix/zerrors_linux_ppc64.go

@@ -3,7 +3,7 @@
 
 // +build ppc64,linux
 
-// Created by cgo -godefs - DO NOT EDIT
+// Code generated by cmd/cgo -godefs; DO NOT EDIT.
 // cgo -godefs -- -Wall -Werror -static -I/tmp/include _const.go
 
 package unix

unix/zerrors_linux_ppc64le.go

@@ -3,7 +3,7 @@
 
 // +build ppc64le,linux
 
-// Created by cgo -godefs - DO NOT EDIT
+// Code generated by cmd/cgo -godefs; DO NOT EDIT.
 // cgo -godefs -- -Wall -Werror -static -I/tmp/include _const.go
 
 package unix

unix/zerrors_linux_s390x.go

@@ -3,7 +3,7 @@
 
 // +build s390x,linux
 
-// Created by cgo -godefs - DO NOT EDIT
+// Code generated by cmd/cgo -godefs; DO NOT EDIT.
 // cgo -godefs -- -Wall -Werror -static -I/tmp/include -fsigned-char _const.go
 
 package unix

unix/zerrors_linux_sparc64.go

@@ -1,5 +1,5 @@
 // mkerrors.sh -m64
-// MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
+// Code generated by the command above; DO NOT EDIT.
 
 // +build sparc64,linux
 

unix/zsysctl_openbsd_386.go

@@ -1,5 +1,5 @@
 // mksysctl_openbsd.pl
-// MACHINE GENERATED BY THE ABOVE COMMAND; DO NOT EDIT
+// Code generated by the command above; DO NOT EDIT.
 
 package unix
 

unix/zsysctl_openbsd_amd64.go

@@ -1,5 +1,5 @@
 // mksysctl_openbsd.pl
-// MACHINE GENERATED BY THE ABOVE COMMAND; DO NOT EDIT
+// Code generated by the command above; DO NOT EDIT.
 
 // +build amd64,openbsd
 

unix/zsysctl_openbsd_arm.go

@@ -1,5 +1,5 @@
 // mksysctl_openbsd.pl
-// MACHINE GENERATED BY THE ABOVE COMMAND; DO NOT EDIT
+// Code generated by the command above; DO NOT EDIT.
 
 package unix
 

unix/zsysnum_linux_sparc64.go

@@ -1,5 +1,5 @@
 // mksysnum_linux.pl -Ilinux/usr/include -m64 -D__arch64__ linux/usr/include/asm/unistd.h
-// MACHINE GENERATED BY THE ABOVE COMMAND; DO NOT EDIT
+// Code generated by the command above; DO NOT EDIT.
 
 // +build sparc64,linux
 

unix/zsysnum_netbsd_386.go

@@ -1,5 +1,5 @@
 // mksysnum_netbsd.pl
-// MACHINE GENERATED BY THE ABOVE COMMAND; DO NOT EDIT
+// Code generated by the command above; DO NOT EDIT.
 
 // +build 386,netbsd
 

unix/zsysnum_netbsd_amd64.go

@@ -1,5 +1,5 @@
 // mksysnum_netbsd.pl
-// MACHINE GENERATED BY THE ABOVE COMMAND; DO NOT EDIT
+// Code generated by the command above; DO NOT EDIT.
 
 // +build amd64,netbsd
 

unix/zsysnum_netbsd_arm.go

@@ -1,5 +1,5 @@
 // mksysnum_netbsd.pl
-// MACHINE GENERATED BY THE ABOVE COMMAND; DO NOT EDIT
+// Code generated by the command above; DO NOT EDIT.
 
 // +build arm,netbsd
 

unix/zsysnum_openbsd_386.go

@@ -1,5 +1,5 @@
 // mksysnum_openbsd.pl
-// MACHINE GENERATED BY THE ABOVE COMMAND; DO NOT EDIT
+// Code generated by the command above; DO NOT EDIT.
 
 // +build 386,openbsd
 

unix/zsysnum_openbsd_arm.go

@@ -1,5 +1,5 @@
 // mksysnum_openbsd.pl
-// MACHINE GENERATED BY THE ABOVE COMMAND; DO NOT EDIT
+// Code generated by the command above; DO NOT EDIT.
 
 // +build arm,openbsd