Split to multiple bash commands.

This can fix the error "/bin/bash: Argument list too long", if we get a
really long apk list.
Bug tracker Link: http://code.google.com/p/android/issues/detail?id=38937

Change-Id: Ic6318465a0413ba9ac5afe2c4974ebb3abf59b01

Conflicts:
	core/Makefile