Don't use PathV1.h in FileUtilities.h.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183941 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/bugpoint/ExecutionDriver.cpp b/tools/bugpoint/ExecutionDriver.cpp
index da36045..fd0cc59 100644
--- a/tools/bugpoint/ExecutionDriver.cpp
+++ b/tools/bugpoint/ExecutionDriver.cpp
@@ -446,8 +446,8 @@
 
   std::string Error;
   bool FilesDifferent = false;
-  if (int Diff = DiffFilesWithTolerance(sys::Path(ReferenceOutputFile),
-                                        sys::Path(Output.str()),
+  if (int Diff = DiffFilesWithTolerance(ReferenceOutputFile,
+                                        Output.str(),
                                         AbsTolerance, RelTolerance, &Error)) {
     if (Diff == 2) {
       errs() << "While diffing output: " << Error << '\n';