unix: update openbsd/{386,amd64.arm} MAP_* consts

Update the MAP_* consts for openbsd/{386,amd64.arm} on OpenBSD 6.5.
openbsd/arm64 was already generated on OpenBSD 6.5 for CL 173678.

Fixes golang/go#34589

Change-Id: Ie06bdc28ddd39a8c8e4f61137cb060f74c59e1eb
Reviewed-on: https://go-review.googlesource.com/c/sys/+/198157
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Benny Siegert <bsiegert@gmail.com>

unix/zerrors_openbsd_386.go

@@ -881,14 +881,15 @@ const (
 	MADV_SPACEAVAIL                   = 0x5
 	MADV_WILLNEED                     = 0x3
 	MAP_ANON                          = 0x1000
-	MAP_COPY                          = 0x4
+	MAP_ANONYMOUS                     = 0x1000
+	MAP_CONCEAL                       = 0x8000
+	MAP_COPY                          = 0x2
 	MAP_FILE                          = 0x0
 	MAP_FIXED                         = 0x10
-	MAP_FLAGMASK                      = 0x1ff7
-	MAP_HASSEMAPHORE                  = 0x200
-	MAP_INHERIT                       = 0x80
+	MAP_FLAGMASK                      = 0xfff7
+	MAP_HASSEMAPHORE                  = 0x0
+	MAP_INHERIT                       = 0x0
 	MAP_INHERIT_COPY                  = 0x1
-	MAP_INHERIT_DONATE_COPY           = 0x3
 	MAP_INHERIT_NONE                  = 0x2
 	MAP_INHERIT_SHARE                 = 0x0
 	MAP_NOEXTEND                      = 0x100
@@ -896,7 +897,8 @@ const (
 	MAP_PRIVATE                       = 0x2
 	MAP_RENAME                        = 0x20
 	MAP_SHARED                        = 0x1
-	MAP_TRYFIXED                      = 0x400
+	MAP_STACK                         = 0x4000
+	MAP_TRYFIXED                      = 0x0
 	MCL_CURRENT                       = 0x1
 	MCL_FUTURE                        = 0x2
 	MNT_ASYNC                         = 0x40

unix/zerrors_openbsd_amd64.go

@@ -920,10 +920,11 @@ const (
 	MADV_WILLNEED                     = 0x3
 	MAP_ANON                          = 0x1000
 	MAP_ANONYMOUS                     = 0x1000
+	MAP_CONCEAL                       = 0x8000
 	MAP_COPY                          = 0x2
 	MAP_FILE                          = 0x0
 	MAP_FIXED                         = 0x10
-	MAP_FLAGMASK                      = 0x7ff7
+	MAP_FLAGMASK                      = 0xfff7
 	MAP_HASSEMAPHORE                  = 0x0
 	MAP_INHERIT                       = 0x0
 	MAP_INHERIT_COPY                  = 0x1

unix/zerrors_openbsd_arm.go

@@ -1,11 +1,11 @@
 // mkerrors.sh
 // Code generated by the command above; see README.md. DO NOT EDIT.
 
+// +build arm,openbsd
+
 // Code generated by cmd/cgo -godefs; DO NOT EDIT.
 // cgo -godefs -- _const.go
 
-// +build arm,openbsd
-
 package unix
 
 import "syscall"
@@ -881,10 +881,11 @@ const (
 	MADV_WILLNEED                     = 0x3
 	MAP_ANON                          = 0x1000
 	MAP_ANONYMOUS                     = 0x1000
+	MAP_CONCEAL                       = 0x8000
 	MAP_COPY                          = 0x2
 	MAP_FILE                          = 0x0
 	MAP_FIXED                         = 0x10
-	MAP_FLAGMASK                      = 0x3ff7
+	MAP_FLAGMASK                      = 0xfff7
 	MAP_HASSEMAPHORE                  = 0x0
 	MAP_INHERIT                       = 0x0
 	MAP_INHERIT_COPY                  = 0x1
@@ -896,6 +897,7 @@ const (
 	MAP_PRIVATE                       = 0x2
 	MAP_RENAME                        = 0x0
 	MAP_SHARED                        = 0x1
+	MAP_STACK                         = 0x4000
 	MAP_TRYFIXED                      = 0x0
 	MCL_CURRENT                       = 0x1
 	MCL_FUTURE                        = 0x2