Propagate -j in make calls for better parallelization

Also fix deps for parallel build.
It should speed up full NDK build.

Change-Id: Id62b4ba6b2d09fd28a2724c285eb0069b79b13fb
Signed-off-by: Pavel Chupin <pavel.v.chupin@intel.com>
Merge remote-tracking branch 'aosp/master' into uber