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
diff --git a/core/clang/TARGET_mips.mk b/core/clang/TARGET_mips.mk
index 0107519..011c2a6 100644
--- a/core/clang/TARGET_mips.mk
+++ b/core/clang/TARGET_mips.mk
@@ -50,4 +50,5 @@
   $(call $(clang_2nd_arch_prefix)convert-to-clang-flags,$($(clang_2nd_arch_prefix)TARGET_GLOBAL_LDFLAGS)) \
   $(CLANG_CONFIG_mips_TARGET_EXTRA_LDFLAGS)
 
-$(clang_2nd_arch_prefix)RS_TRIPLE := mipsel-unknown-linux
+$(clang_2nd_arch_prefix)RS_TRIPLE := armv7-none-linux-gnueabi
+$(clang_2nd_arch_prefix)RS_TRIPLE_CFLAGS :=