blobs: de-commonize ril blobs

* express has major problems trying to use d2 ril blobs and we're
  updating d2 to kk-series blobs

Change-Id: Ia62d2d70d5e84ddc462c5a3fca1fea4f6aba9266
extract-files: add ability to specify a source directory for props

Change-Id: Icf24bb527a32d0867d9d345c5dfbef8e05e6ea71