Convert a use of 'std::ostringstream' to 'llvm::raw_string_ostream'.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64033 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/CFRefCount.cpp b/lib/Analysis/CFRefCount.cpp
index ee17a57..a530905 100644
--- a/lib/Analysis/CFRefCount.cpp
+++ b/lib/Analysis/CFRefCount.cpp
@@ -30,7 +30,6 @@
 #include "llvm/Support/Compiler.h"
 #include "llvm/ADT/STLExtras.h"
 #include <ostream>
-#include <sstream>
 #include <stdarg.h>
 
 using namespace clang;
@@ -2479,13 +2478,13 @@
   
   // Generate the diagnostic.
   FullSourceLoc L( S->getLocStart(), SMgr);
-  std::ostringstream os;
+  std::string sbuf;
+  llvm::raw_string_ostream os(sbuf);
   
   os << "Object allocated on line " << AllocLine;
   
   if (FirstBinding)
     os << " and stored into '" << FirstBinding->getString() << '\'';  
-
   
   // Get the retain count.
   const RefVal* RV = EndN->getState()->get<RefBindings>(Sym);