unix: add additional rlimit resource constants on NetBSD

CL 45052 added them to mkerrors.sh but they weren't generated on NetBSD. Do so now.

Change-Id: I314b0b7b203aba910a5733f9fbb63b1a0e6ccecf
Reviewed-on: https://go-review.googlesource.com/137595
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

unix/zerrors_netbsd_386.go

@@ -1150,7 +1150,10 @@ const (
 	RLIMIT_CPU                        = 0x0
 	RLIMIT_DATA                       = 0x2
 	RLIMIT_FSIZE                      = 0x1
+	RLIMIT_MEMLOCK                    = 0x6
 	RLIMIT_NOFILE                     = 0x8
+	RLIMIT_NPROC                      = 0x7
+	RLIMIT_RSS                        = 0x5
 	RLIMIT_STACK                      = 0x3
 	RLIM_INFINITY                     = 0x7fffffffffffffff
 	RTAX_AUTHOR                       = 0x6

unix/zerrors_netbsd_amd64.go

@@ -1140,7 +1140,10 @@ const (
 	RLIMIT_CPU                        = 0x0
 	RLIMIT_DATA                       = 0x2
 	RLIMIT_FSIZE                      = 0x1
+	RLIMIT_MEMLOCK                    = 0x6
 	RLIMIT_NOFILE                     = 0x8
+	RLIMIT_NPROC                      = 0x7
+	RLIMIT_RSS                        = 0x5
 	RLIMIT_STACK                      = 0x3
 	RLIM_INFINITY                     = 0x7fffffffffffffff
 	RTAX_AUTHOR                       = 0x6

unix/zerrors_netbsd_arm.go

@@ -1130,7 +1130,10 @@ const (
 	RLIMIT_CPU                        = 0x0
 	RLIMIT_DATA                       = 0x2
 	RLIMIT_FSIZE                      = 0x1
+	RLIMIT_MEMLOCK                    = 0x6
 	RLIMIT_NOFILE                     = 0x8
+	RLIMIT_NPROC                      = 0x7
+	RLIMIT_RSS                        = 0x5
 	RLIMIT_STACK                      = 0x3
 	RLIM_INFINITY                     = 0x7fffffffffffffff
 	RTAX_AUTHOR                       = 0x6