m7-common: remove HTC diagnostic binaries

Change-Id: I4d020e1c9f6f317b6d0a3acb4c216fc2981c1e6a
m7-common: make proprietary file system dir implicit

Change-Id: I412b77d92cfe78e581c399d7c79a10b14a671ffb
m7: camera: fix focal-length parameter on back camera

Change-Id: I5d2b88ce17b7318c4733e4951faa4f1ab4f5e8f1