common.py: Fix the build.
common.py: Fix the build.

Should only use source_info_dict when creating incremental OTAs.

Change-Id: I3305632aab3334f5e6a555cde7ef0c311965c4b8
(cherry picked from commit aac4ad56b6c60e271d807604b20f72084c58b426)

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