tree ba07fc1be4ab4caf6ea14849e845a6d7c990faf4
parent c9941884496ab55fbe617bb24da4531004ab52ce
author Colin Cross <ccross@android.com> 1477071551 -0700
committer Colin Cross <ccross@android.com> 1477071551 -0700

Don't create prebuilts for files that don't exist

make checkbuild was ignoring prebuilts, so it didn't flag prebuilts with
missing source files.  Don't create prebuilts for files that don't exist
so checkbuild can start treating it as an error.

Bug: 32332829
Test: m -j checkbuild
Change-Id: I250301c30eb971bc8763c06bbbf2afc9f426eaa1