am 088319dd: am dda94546: am 4a1f42d7: am 7c7f28e7: Merge changes Ib1d950e1,I3d020a3c,Ic9594718

* commit '088319dd22ac4bc65eb284dfeeab368ac2e90ca9':
  Add 2nd arch directories for apps
  Set up rules to build prebuilts for TARGET_2ND_ARCH
  Set up rules to build packages for TARGET_2ND_ARCH