Revert TARGET_BUILD_UNBUNDLED for buildbot builds.

It interferes with building on a full platform tree. This partially
reverts https://r.android.com/1324611.

Test: art/tools/buildbot-build.sh on AOSP master
Bug: 157549171
Change-Id: Ie56ecd4c6df9d134f1ce11f32f0940390de6ada3
1 file changed