Allow Device Specific Headers

This allows a device to define its own headers compared to default

Conflicts:
	core/binary.mk
Build: update qcom_utils.mk

Add build macro to determine Android Release

Adding platform sdk version 18 for JB MR2.

Change-Id: I79aa831ddd335bd14bd777506c210acc5d9960f1
qcom_utils: Add qsd8k to qcom platforms

PS2: fix typo

Change-Id: Id85569d1dd7be2f4c0620827da6d89e63b658aa9