tsan/asan: add mutex to 64-bit allocator

llvm-svn: 159516
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_mutex.h b/compiler-rt/lib/sanitizer_common/sanitizer_mutex.h
index 8bb9d36..6cc86d3 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_mutex.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_mutex.h
@@ -79,6 +79,8 @@
   void operator=(const GenericScopedReadLock&);
 };
 
+typedef GenericScopedLock<SpinMutex> SpinMutexLock;
+
 }  // namespace __sanitizer
 
 #endif  // SANITIZER_MUTEX_H