Move libclang prebuilt to Android.bp

Test: mmma -j frameworks/compile/slang
Test: m -j with Go race detector enabled
(cherry picked from commit f697cc615101adf28e36de45bc064d4356b8bc07)

Change-Id: Ib327356e33f3f280577e7dbcf87026c2f93854c5
2 files changed