posix_acl: uapi header split

Export the base definitions and the xattr representation of POSIX ACLs
to user space.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild
index 185f8ea..e266739 100644
--- a/include/uapi/linux/Kbuild
+++ b/include/uapi/linux/Kbuild
@@ -335,6 +335,8 @@
 header-y += pkt_sched.h
 header-y += pmu.h
 header-y += poll.h
+header-y += posix_acl.h
+header-y += posix_acl_xattr.h
 header-y += posix_types.h
 header-y += ppdev.h
 header-y += ppp-comp.h