Update prebuilt Clang to match Android kernel.

Bug: 132428451
Change-Id: I8f6e2cb23f381fc0c02ddea99b867e58e925e5be
diff --git a/linux-x64/clang/include/llvm/Support/VCSRevision.h b/linux-x64/clang/include/llvm/Support/VCSRevision.h
index 7e554bb..a6a8b9c 100644
--- a/linux-x64/clang/include/llvm/Support/VCSRevision.h
+++ b/linux-x64/clang/include/llvm/Support/VCSRevision.h
@@ -1 +1,2 @@
-#define LLVM_REVISION "git-e6bbea3a709"
+#define LLVM_REVISION "60cf23e54e46c807513f7a36d0a7b777920b5881"
+#define LLVM_REPOSITORY "/buildbot/tmp/tmpCdFZ_W"