[PATCH] Clang side changes for removal of support for runtime multi-threading.

[Reid Kleckner]

lgtm

Will commit in a moment.

================
Comment at: tools/libclang/CIndex.cpp:2566
@@ -2565,3 +2565,3 @@
   // call report_fatal_error.
   fprintf(stderr, "LIBCLANG FATAL ERROR: %s\n", reason.c_str());
   ::abort();
----------------
Unrelated issue: I wonder if this should call fflush(stderr).

http://reviews.llvm.org/D4077