Switch FileRemover from PathV1 to V2.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128630 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/bugpoint/BugDriver.cpp b/tools/bugpoint/BugDriver.cpp
index 1cbf632..c3decd6 100644
--- a/tools/bugpoint/BugDriver.cpp
+++ b/tools/bugpoint/BugDriver.cpp
@@ -194,7 +194,7 @@
   // Make sure the reference output file gets deleted on exit from this
   // function, if appropriate.
   sys::Path ROF(ReferenceOutputFile);
-  FileRemover RemoverInstance(ROF, CreatedOutput && !SaveTemps);
+  FileRemover RemoverInstance(ROF.str(), CreatedOutput && !SaveTemps);
 
   // Diff the output of the raw program against the reference output.  If it
   // matches, then we assume there is a miscompilation bug and try to