Add 'const' qualifiers to static const char* variables.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186371 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/StructurizeCFG.cpp b/lib/Transforms/Scalar/StructurizeCFG.cpp
index bec066b..bb6f163 100644
--- a/lib/Transforms/Scalar/StructurizeCFG.cpp
+++ b/lib/Transforms/Scalar/StructurizeCFG.cpp
@@ -45,7 +45,7 @@
 
 // The name for newly created blocks.
 
-static const char *FlowBlockName = "Flow";
+static const char *const FlowBlockName = "Flow";
 
 /// @brief Find the nearest common dominator for multiple BasicBlocks
 ///