Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/Analysis/RegionInfoImpl.h b/linux-x64/clang/include/llvm/Analysis/RegionInfoImpl.h
index eb6baac..5904214 100644
--- a/linux-x64/clang/include/llvm/Analysis/RegionInfoImpl.h
+++ b/linux-x64/clang/include/llvm/Analysis/RegionInfoImpl.h
@@ -22,6 +22,7 @@
 #include "llvm/Analysis/PostDominators.h"
 #include "llvm/Analysis/RegionInfo.h"
 #include "llvm/Analysis/RegionIterator.h"
+#include "llvm/Config/llvm-config.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/raw_ostream.h"
@@ -674,7 +675,7 @@
 #ifdef EXPENSIVE_CHECKS
   region->verifyRegion();
 #else
-  DEBUG(region->verifyRegion());
+  LLVM_DEBUG(region->verifyRegion());
 #endif
 
   updateStatistics(region);