add build.prop for other partitions to the dist out

Previously, only system/build.prop was registered as dist out. This
change adds build.prop in the other partitions to the dist out. This
will allow us to examine those build.prop files without downloading
the entire target-files.zip file.

Bug: 117892318
Test: examine the dist out
Change-Id: I6f4ba16d765336a57f0da90edba788a627f25e60