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

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186383 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/StaticAnalyzer/Core/BugReporter.cpp b/lib/StaticAnalyzer/Core/BugReporter.cpp
index 912d5c5..d5636da 100644
--- a/lib/StaticAnalyzer/Core/BugReporter.cpp
+++ b/lib/StaticAnalyzer/Core/BugReporter.cpp
@@ -1592,8 +1592,8 @@
   return S;
 }
 
-static const char *StrEnteringLoop = "Entering loop body";
-static const char *StrLoopBodyZero = "Loop body executed 0 times";
+static const char *const StrEnteringLoop = "Entering loop body";
+static const char *const StrLoopBodyZero = "Loop body executed 0 times";
 
 static bool
 GenerateAlternateExtensivePathDiagnostic(PathDiagnostic& PD,