Inliner::OptimizationRemark: Fix crash in clang/test/Frontend/optimization-remark.c on some hosts, including --vg.

DebugLoc in Callsite would not live after Inliner. It should be copied before Inliner.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206459 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/IR/DiagnosticInfo.h

@@ -17,6 +17,7 @@
 
 #include "llvm-c/Core.h"
 #include "llvm/ADT/ArrayRef.h"
+#include "llvm/IR/DebugLoc.h"
 #include "llvm/Support/Casting.h"
 
 namespace llvm {
@@ -289,7 +290,7 @@ private:
   const Function &Fn;
 
   /// Debug location where this diagnostic is triggered.
-  const DebugLoc &DLoc;
+  DebugLoc DLoc;
 
   /// Message to report.
   const Twine &Msg;