Use prebuilt libclang_rt.profile.

Bug: 17574078
Change-Id: I4838cd5d125a0b2bf76aad2fdaef1ee3122687e8
diff --git a/core/clang/TARGET_arm64.mk b/core/clang/TARGET_arm64.mk
index ba6e5f1..b67d458 100644
--- a/core/clang/TARGET_arm64.mk
+++ b/core/clang/TARGET_arm64.mk
@@ -62,3 +62,5 @@
 RS_TRIPLE := aarch64-linux-android
 RS_TRIPLE_CFLAGS :=
 RS_COMPAT_TRIPLE := aarch64-linux-android
+
+TARGET_LIBPROFILE_RT := $(LLVM_RTLIB_PATH)/libclang_rt.profile-aarch64-android.a