util-linux: enable pam_umask(8) for su(1).

This way the su(1) session will always have a proper umask(2),
set from /etc/login.defs by default.

srcpkgs/util-linux/files/su.pam

@@ -3,5 +3,6 @@ auth 		required	pam_unix.so
 account		required	pam_unix.so
 session		optional	pam_mail.so	dir=/var/mail standard
 session		optional	pam_xauth.so
+session		optional 	pam_umask.so 	usergroups
 session		required	pam_env.so
 session		required	pam_unix.so

srcpkgs/util-linux/template

@@ -1,7 +1,7 @@
 # Template file for 'util-linux'
 pkgname=util-linux
 version=2.25.2
-revision=3
+revision=4
 short_desc="Miscellaneous linux utilities"
 maintainer="Juan RP <xtraeme@gmail.com>"
 homepage="http://userweb.kernel.org/~kzak/util-linux-ng"