In apps_only build dist a module only if it has a BUILT file.
In apps_only build dist a module only if it has a BUILT file.

This allows you to specify a PHONY target in TARGET_BUILD_APPS.

Change-Id: Idd813cd0dbdb14c705fbd3187596d4c64b99d045

xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build