Update RenderScript build rules for rebase to LLVM r256229

http://b/26987366

- Use clang-2690385 to build RenderScript toolchain.
- Use armv7-linux-androideabi as the triple used to build RenderScript
  runtime libraries.

(cherry picked from commit 41f4b242e38c6f95fff133cfb6f07691f56f672b)

Change-Id: I50751f410a2f7c83532cec9b96c50d9afe1224c1
diff --git a/core/clang/TARGET_mips.mk b/core/clang/TARGET_mips.mk
index 19bbaf2..1a0176a 100644
--- a/core/clang/TARGET_mips.mk
+++ b/core/clang/TARGET_mips.mk
@@ -60,7 +60,7 @@
   $(call $(clang_2nd_arch_prefix)convert-to-clang-flags,$($(clang_2nd_arch_prefix)TARGET_GLOBAL_LDFLAGS)) \
   $(CLANG_CONFIG_mips_TARGET_EXTRA_LDFLAGS)
 
-$(clang_2nd_arch_prefix)RS_TRIPLE := armv7-none-linux-gnueabi
+$(clang_2nd_arch_prefix)RS_TRIPLE := armv7-linux-androideabi
 $(clang_2nd_arch_prefix)RS_TRIPLE_CFLAGS :=
 RS_COMPAT_TRIPLE := mipsel-linux-android