unix: add AT_SYMLINK_FOLLOW const on netbsd

Change-Id: I6f6d9534389800b6f245021db051f96e90411173
Reviewed-on: https://go-review.googlesource.com/c/sys/+/182897
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Benny Siegert <bsiegert@gmail.com>
diff --git a/unix/types_netbsd.go b/unix/types_netbsd.go
index 2dd4f95..4a96d72 100644
--- a/unix/types_netbsd.go
+++ b/unix/types_netbsd.go
@@ -254,6 +254,7 @@
 
 const (
 	AT_FDCWD            = C.AT_FDCWD
+	AT_SYMLINK_FOLLOW   = C.AT_SYMLINK_FOLLOW
 	AT_SYMLINK_NOFOLLOW = C.AT_SYMLINK_NOFOLLOW
 )
 
diff --git a/unix/ztypes_netbsd_386.go b/unix/ztypes_netbsd_386.go
index a2268b4..86736ab 100644
--- a/unix/ztypes_netbsd_386.go
+++ b/unix/ztypes_netbsd_386.go
@@ -411,6 +411,7 @@
 
 const (
 	AT_FDCWD            = -0x64
+	AT_SYMLINK_FOLLOW   = 0x400
 	AT_SYMLINK_NOFOLLOW = 0x200
 )
 
diff --git a/unix/ztypes_netbsd_amd64.go b/unix/ztypes_netbsd_amd64.go
index 59e1da0..3427811 100644
--- a/unix/ztypes_netbsd_amd64.go
+++ b/unix/ztypes_netbsd_amd64.go
@@ -418,6 +418,7 @@
 
 const (
 	AT_FDCWD            = -0x64
+	AT_SYMLINK_FOLLOW   = 0x400
 	AT_SYMLINK_NOFOLLOW = 0x200
 )
 
diff --git a/unix/ztypes_netbsd_arm.go b/unix/ztypes_netbsd_arm.go
index 1f1f0f3..399f37a 100644
--- a/unix/ztypes_netbsd_arm.go
+++ b/unix/ztypes_netbsd_arm.go
@@ -416,6 +416,7 @@
 
 const (
 	AT_FDCWD            = -0x64
+	AT_SYMLINK_FOLLOW   = 0x400
 	AT_SYMLINK_NOFOLLOW = 0x200
 )
 
diff --git a/unix/ztypes_netbsd_arm64.go b/unix/ztypes_netbsd_arm64.go
index 8dca204..32f0c15 100644
--- a/unix/ztypes_netbsd_arm64.go
+++ b/unix/ztypes_netbsd_arm64.go
@@ -418,6 +418,7 @@
 
 const (
 	AT_FDCWD            = -0x64
+	AT_SYMLINK_FOLLOW   = 0x400
 	AT_SYMLINK_NOFOLLOW = 0x200
 )