Move PathV2.h to Path.h

Most clients have already been moved from Path V1 to V2. The ones using V1
now include PathV1.h explicitly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183801 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/PathV2.cpp b/lib/Support/PathV2.cpp
index 9533e78..24eac47 100644
--- a/lib/Support/PathV2.cpp
+++ b/lib/Support/PathV2.cpp
@@ -11,7 +11,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/Support/PathV2.h"
+#include "llvm/Support/Path.h"
 #include "llvm/Support/Endian.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/FileSystem.h"