Fix OTA scripts to generate incremental BBOTA with OEM property.
Fix OTA scripts to generate incremental BBOTA with OEM property.

Bug: 21803136
Change-Id: I3a45e8aea0b4f4f4f2acb4c9c8a7fad7a014680c

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