build scripts: Monster re-write: Using global exports and created simple 4 lines for variants and have 1 master build script using export vars to make things a whole lot easier

Conflicts:
	build-att.sh
	build-vzw.sh
	build_all.sh
	build_all_branches.sh
	build_master.sh

Change-Id: I239bfdb4962f44e6298025303dd90e3100e5baa9
build-scripts: update new build scripts for ChronicKernel