Fix building without SELINUX

since the scon is now a mandatory arg, it needs to exist even if
NULL

Change-Id: I8ba31a7a8cf357e9b0c43cee81ab49d3eb192819
toolbox: Add levelFromUid categorization support to restorecon

This is necessary for the app data relabeling on migrated devices
to include the proper app context. Freshly installed apps get this
done automagically, as do newly created files.

Change-Id: If7421dac01c6ae8bd78e66f71e69298ed850a7ab
init.goldfish.rc: use ext4

Change-Id: Ib5e0bb0d199f09c9cb2d5903f77fae896d4720d6
Merge branch 'jellybean' of https://github.com/UltimatumKang/android_system_core into jellybean