fs: ext3/4: enable xattr (for 4.4)

New updater script needs newer APIs.
This is a compatibility patch for the kernel
which enables the xattr for both filesystems (ext3/4).

It also enables the securtiy option for both, which
might help SELinux (anyway, i don't like it...).

Fix also a bug in ext3_trim_all_free()

Signed-off-by: Blechd0se <alex.christ@hotmail.de>