Track repos for CM's bootable/recovery

We need this now after recent changes in system/core. To make our lives easier, lets
just track bootable/recovery from CM so we dont have to play the revert game too much

Change-Id: I366467d17cebfed68a9c6a3fd671deb033b8cb4c
Merge pull request #4 from AOSPA-legacy/kitkat

Track repos for CM's bootable/recovery