Fix RS_TRIPLE and RS_TRIPLE_CFLAGS.

Bug: 17333374

Add RS_TRIPLE_CFLAGS to ensure that we build with the proper defines on
targets like x86. This also changes all build targets to use the
proper 32/64-bit triples when creating their runtime libraries.

(cherry picked from commit 039675adb8882b21e770edac1bd167d7fb489052)

Change-Id: Ib7b5bb7aae5abcad9ab477a00e368179d0121091
6 files changed