Add Android.mk file in bltsville repo root which calls subdirectory makefiles.
Add Android.mk file in bltsville repo root which calls subdirectory makefiles.

Change-Id: Idd8756f1bef5b037a102b1af07528e79df6e4fd5
Signed-off-by: Rick Tillery <d9686acfea9c9dda5d42aefb14ca106703d92006@ti.com>

omapzoom/platform-external-bltsville,omapzoom/platform-external-bltsville,omapzoom/platform-external-bltsville,omapzoom/platform-external-bltsville