Update to kernel headers v4.9.3.

Test: Built arm, arm64, x86, x86_64 targets.
Test: Booted on angler, and ran bionic unit tests (32 bit and 64 bit).

Change-Id: I14a8dcbea11b41f83431eabed6590cd25af07b1d
diff --git a/libc/kernel/uapi/linux/posix_acl_xattr.h b/libc/kernel/uapi/linux/posix_acl_xattr.h
new file mode 100644
index 0000000..ef39124
--- /dev/null
+++ b/libc/kernel/uapi/linux/posix_acl_xattr.h
@@ -0,0 +1,35 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ***   To edit the content of this header, modify the corresponding
+ ***   source file (e.g. under external/kernel-headers/original/) then
+ ***   run bionic/libc/kernel/tools/update_all.py
+ ***
+ ***   Any manual change here will be lost the next time this script will
+ ***   be run. You've been warned!
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef __UAPI_POSIX_ACL_XATTR_H
+#define __UAPI_POSIX_ACL_XATTR_H
+#include <linux/types.h>
+#define POSIX_ACL_XATTR_VERSION 0x0002
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ACL_UNDEFINED_ID (- 1)
+struct posix_acl_xattr_entry {
+  __le16 e_tag;
+  __le16 e_perm;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  __le32 e_id;
+};
+struct posix_acl_xattr_header {
+  __le32 a_version;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
+#endif