Record MD5 sum of proprietary files

setup-makefiles.sh records the MD5 sum in proprietary-files.md5sum.
copy-files.sh and extract-files.sh check the MD5 sums before running setup-makefiles.sh.

Change-Id: I5ba7868b955bf4644ff07281fa2fc6dbf2f7db12
bluetooth: Disable bluesleep for now

This makes Bluetooth work for now.
Will have to watch battery drain, but there is some dissent
anyway on the effects of bluesleep.

Change-Id: Id8e0e51e416dfa1b483b4611041eb87bd55fd662