m7-common: add libCB

Change-Id: I7556d536c92fc9741ffc839930db116581a6769c
m7-common: Add extended extractor to proprietary file list

Change-Id: I5db34a83ed39f29b19a1be1ab2e5c48ce64db3ad
m7-common: commonize some BoardConfig defines

Change-Id: I1641f8766d66d20905d29f6cd1e1a694916c83b1