unix: add FS_IOC_SETFLAGS on linux

Change-Id: I455c008a114a017a6ecedb134f9af17d14dd249b
Reviewed-on: https://go-review.googlesource.com/c/sys/+/240037
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matt Layher <mdlayher@gmail.com>
diff --git a/unix/zerrors_linux_arm64.go b/unix/zerrors_linux_arm64.go
index 370d0a7..8b0e024 100644
--- a/unix/zerrors_linux_arm64.go
+++ b/unix/zerrors_linux_arm64.go
@@ -80,6 +80,7 @@
 	FS_IOC_GET_ENCRYPTION_NONCE      = 0x8010661b
 	FS_IOC_GET_ENCRYPTION_POLICY     = 0x400c6615
 	FS_IOC_GET_ENCRYPTION_PWSALT     = 0x40106614
+	FS_IOC_SETFLAGS                  = 0x40086602
 	FS_IOC_SET_ENCRYPTION_POLICY     = 0x800c6613
 	F_GETLK                          = 0x5
 	F_GETLK64                        = 0x5