selinux: use "grep -E" instead of "egrep"

commit c969bb8 upstream.

The latest version of grep claims that egrep is now obsolete so the build
now contains warnings that look like:
	egrep: warning: egrep is obsolescent; using grep -E
fix this by using "grep -E" instead.

Cc: Paul Moore <[email protected]>
Cc: Stephen Smalley <[email protected]>
Cc: Eric Paris <[email protected]>
Cc: [email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
[PM: tweak to remove vdso reference, cleanup subj line]
Signed-off-by: Paul Moore <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

scripts/selinux/install_policy.sh

@@ -56,7 +56,7 @@ fi
 cd /etc/selinux/dummy/contexts/files
 $SF file_contexts /
 
-mounts=`cat /proc/$$/mounts | egrep "ext2|ext3|xfs|jfs|ext4|ext4dev|gfs2" | awk '{ print $2 '}`
+mounts=`cat /proc/$$/mounts | grep -E "ext2|ext3|xfs|jfs|ext4|ext4dev|gfs2" | awk '{ print $2 '}`
 $SF file_contexts $mounts