Track CM SELinux repos

Change-Id: I079448dbd59f837756a4c379adf15c08a59707e3
Track CM external/clang

Has optimizations needed for a few devices

Change-Id: I18b0c64155572a980822157e384de0ac3c3a2c94
Bring up to kitkat 4.4r1.2

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>