Fix MSVC 2013 build after rL260504

llvm-svn: 260511
diff --git a/llvm/lib/Transforms/Scalar/LoopVersioningLICM.cpp b/llvm/lib/Transforms/Scalar/LoopVersioningLICM.cpp
index 788de61..18182b6 100644
--- a/llvm/lib/Transforms/Scalar/LoopVersioningLICM.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopVersioningLICM.cpp
@@ -92,7 +92,7 @@
 #include "llvm/Transforms/Utils/ValueMapper.h"
 
 #define DEBUG_TYPE "loop-versioning-licm"
-static constexpr char LICMVersioningMetaData[] =
+static const char* LICMVersioningMetaData =
     "llvm.loop.licm_versioning.disable";
 
 using namespace llvm;