am 85545cd1: Add PHONY target for host core.art so that is included in default build

* commit '85545cd13c16c5074cca987f65247d7abddb39f7':
  Add PHONY target for host core.art so that is included in default build
tree: ff7327af86356d92e25a88a945e496216459782d
  1. build/
  2. jdwpspy/
  3. src/
  4. test/
  5. tools/
  6. .gitignore
  7. Android.mk