code clean https://github.com/MoKee/android_system_core/commit/7f773bebe6bc70ba3d5d94b0ad3a80c18400908b
BoardConfigCommon: Always keep 3 buffers ready (credit: sultanxda)https://github.com/CyanogenMod/android_device_lge_hammerhead/commit/8915ed1
use CM PowerHAL
use qualcomm bionic optimizations