Fix android clang build.
Fix android clang build.

no-builtin-cos|sin|cosf|sinf are not used for some files (g711.c, g711_interface.c, g722_encode.c, g722_decode.c, g722_interface.c, pcm16b.c).
Review URL: https://webrtc-codereview.appspot.com/1032006

git-svn-id: 917f5d3ca488f358c4d40eaec14422cf392ccec9@3369 4adac7df-926f-26a2-2b94-8c16560cd09d

mwgoldsmith/ilbc,TimothyGu/libilbc,mwgoldsmith/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,mwgoldsmith/ilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,mwgoldsmith/libilbc,ShiftMediaProject/libilbc,mwgoldsmith/ilbc,ShiftMediaProject/libilbc,mwgoldsmith/libilbc,mwgoldsmith/libilbc,mwgoldsmith/ilbc