build: New macro to extended the AOSP include directories

New macro to extended the AOSP include directories

Change-Id: I7c3679b519760a1c83568277920331064fb046fd
Signed-off-by: Chetan Rao <chetan.rao@intel.com>
Signed-off-by: Jian Luo <jian.luo@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
Signed-off-by: Jack Ren <jack.ren@intel.com>
Author-tracking-BZ: 104519