extract-files: add ability to specify a source directory for props

Change-Id: If4f18f7e1ea8ee2762c5ff452c9362eb4ec2b3ca
d2: add BOARD_HAVE_SAMSUNG_WIFI

* this lets us build macloader

Change-Id: I0cf08af6597794d5f28dce6c653f1d7e54743c36
d2lte: update to kk rilblobs

Change-Id: I06cee593705a62f02c84e09a507ae6b1faf39508