Fix common include priority for msm7x27-common

PRODUCT_COPY_FILES: First definition wins if the file name is the same. Most specific first.
DEVICE_PACKAGE_OVERLAYS: Last definition wins. Most specific last.
CONFIG := xxx: Last definition wins. Most specific last.

Change-Id: Ic76bd0c64fdb975ebaf5c78c2d9b7551f9024d07