Include Path.h instead of PathV2.h.

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

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@183795 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/ModuleMap.cpp b/lib/Lex/ModuleMap.cpp
index 62b1fc7..acb5694 100644
--- a/lib/Lex/ModuleMap.cpp
+++ b/lib/Lex/ModuleMap.cpp
@@ -27,7 +27,7 @@
 #include "llvm/Support/Allocator.h"
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/Host.h"
-#include "llvm/Support/PathV2.h"
+#include "llvm/Support/Path.h"
 #include "llvm/Support/raw_ostream.h"
 #include <stdlib.h>
 #if defined(LLVM_ON_UNIX)