unix: add RTF_GLOBAL on darwin

Fixes golang/go#45848

Change-Id: Iadd8499a66d5c5b7940df1477d88926f4b30cdb0
Reviewed-on: https://go-review.googlesource.com/c/sys/+/343509
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matt Layher <mdlayher@gmail.com>
diff --git a/unix/zerrors_darwin_amd64.go b/unix/zerrors_darwin_amd64.go
index 5bb48ef..a3a45fe 100644
--- a/unix/zerrors_darwin_amd64.go
+++ b/unix/zerrors_darwin_amd64.go
@@ -1206,6 +1206,7 @@
 	RTF_DONE                          = 0x40
 	RTF_DYNAMIC                       = 0x10
 	RTF_GATEWAY                       = 0x2
+	RTF_GLOBAL                        = 0x40000000
 	RTF_HOST                          = 0x4
 	RTF_IFREF                         = 0x4000000
 	RTF_IFSCOPE                       = 0x1000000
diff --git a/unix/zerrors_darwin_arm64.go b/unix/zerrors_darwin_arm64.go
index 11e5709..31009d7 100644
--- a/unix/zerrors_darwin_arm64.go
+++ b/unix/zerrors_darwin_arm64.go
@@ -1206,6 +1206,7 @@
 	RTF_DONE                          = 0x40
 	RTF_DYNAMIC                       = 0x10
 	RTF_GATEWAY                       = 0x2
+	RTF_GLOBAL                        = 0x40000000
 	RTF_HOST                          = 0x4
 	RTF_IFREF                         = 0x4000000
 	RTF_IFSCOPE                       = 0x1000000