Changes for output zip name
ota: Allow devices to skip generation of recovery-from-boot.p

* Not all devices have a real recovery partition, so those devices
  should skip this generation step.

Change-Id: I4abc3f92b879e6997e4874543ec9772c3179b1d0

Conflicts:
	tools/releasetools/ota_from_target_files
Dont build recovery
More OctOS bits added

Also saves the trouble of renaming the zip files,
using the naming format seen here:

http://probam.net/android-kikat-download

Conflicts:
	core/Makefile
	core/dumpvar.mk