build: Don't call make_recovery_patch if there's no recovery.
build: Don't call make_recovery_patch if there's no recovery.

Change-Id: Iea1bd529eca9cd607da3b420bc4287f95c18219d

xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build