add load_16161616

-Wno-abi suppresses this warning, which we don't care about:

src/Transform.c: In function 'U32_from_U64':
src/Transform.c:103:23: note: The ABI for passing parameters with
                        32-byte alignment has changed in GCC 4.6
     static inline U32 U32_from_U64(U64 w) {
                       ^~~~~~~~~~~~

Change-Id: I7f732a4d0af1323cf1ebc6adda3f980fad084585
4 files changed