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.

Change-Id: I8f6175b1a14af6d03ee90f32069f3688ec227fb9
6 files changed