Fix LLVM_RTLIB_PATH for new prebuilts.

This moved from lib/ to lib64/, but wasn't noticed because no one builds
with the profiler on by default.

Change-Id: I0155263b4a50437ea0864338fb34baefc3df59d2
diff --git a/core/clang/config.mk b/core/clang/config.mk
index b215c6f..5014a6f 100644
--- a/core/clang/config.mk
+++ b/core/clang/config.mk
@@ -4,7 +4,7 @@
 LLVM_PREBUILTS_VERSION ?= clang-2577113
 LLVM_PREBUILTS_BASE ?= prebuilts/clang/host
 LLVM_PREBUILTS_PATH := $(LLVM_PREBUILTS_BASE)/$(BUILD_OS)-x86/$(LLVM_PREBUILTS_VERSION)/bin
-LLVM_RTLIB_PATH := $(LLVM_PREBUILTS_PATH)/../lib/clang/$(LLVM_RELEASE_VERSION)/lib/linux/
+LLVM_RTLIB_PATH := $(LLVM_PREBUILTS_PATH)/../lib64/clang/$(LLVM_RELEASE_VERSION)/lib/linux/
 
 CLANG := $(LLVM_PREBUILTS_PATH)/clang$(BUILD_EXECUTABLE_SUFFIX)
 CLANG_CXX := $(LLVM_PREBUILTS_PATH)/clang++$(BUILD_EXECUTABLE_SUFFIX)