releasetools: Fix error text in ota_from_target_files

property isn't the variable name, prop is

Change-Id: I0fc6adddfd51ba9bc79f6559c61cd831203c9e3d
img_from_target_files: Create md5 hashes for each file

Generate an md5sum-fastboot.md5 file that contains an md5 hash of each
file in the fastboot zip and store the file in the zip.

Change-Id: I19c2ac5a84fb21e965953d1dad0ebcbfd0b78d47
Revert "build: allow multiple cm-device.mk in same repo"

This reverts commit 60f9d59b6c38f05ad90a275d27fcbd136dbee274.
Merge remote-tracking branch 'cm/cm-11.0' into cm-11.0
Merge branch 'cm-11.0' of github.com:Team-Hydra/android_build into cm-11.0