build: Add Qualcomm's helper macros

 * This is used everywhere in Qualcomm's code. There's no reason we need
   to constantly replace it with uglier stuff in our Makefiles.

Change-Id: I0183a338470ec96a38f356a47bae65a0d3fb2c95

Conflicts:
	core/qcom_utils.mk

 Author:    Steve Kondik <shade@chemlab.org>
 On branch android-4.4
 Changes to be committed:

	modified:   core/main.mk
	modified:   core/qcom_utils.mk