Include Path.h instead of PathV2.h.

I am about to move PathV2.h to Path.h.

llvm-svn: 183795
diff --git a/clang/unittests/Lex/PPCallbacksTest.cpp b/clang/unittests/Lex/PPCallbacksTest.cpp
index 36bd5f9..4e0a433 100644
--- a/clang/unittests/Lex/PPCallbacksTest.cpp
+++ b/clang/unittests/Lex/PPCallbacksTest.cpp
@@ -19,7 +19,7 @@
 #include "clang/Lex/ModuleLoader.h"
 #include "clang/Lex/PreprocessorOptions.h"
 #include "llvm/ADT/SmallString.h"
-#include "llvm/Support/PathV2.h"
+#include "llvm/Support/Path.h"
 #include "gtest/gtest.h"
 
 using namespace llvm;