add missing inheritance from chromium.mk

Change-Id: Idafca0934b48b4152a8cdce573ab28194d3e6a68
add mini_common for putting common mini stuffs
- will refactor mini configuration

Change-Id: I56cd31c51d1fc5e216baa23c6a600421aa05bb44
Changing mini to inherit from core_base.mk.

bug: 8503391

Change-Id: Ia71666cdf21661100c8948c2f91b34b512ad958b
Merge tag 'android-4.4_r1' into kitkat-staging

Android 4.4 Release 1.0