Replace all uses of PathV1::isAbsolute with PathV2::is_{absolute,relative}.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@122087 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/FileSystemStatCache.cpp b/lib/Basic/FileSystemStatCache.cpp
index d9e89cd..c8b07af 100644
--- a/lib/Basic/FileSystemStatCache.cpp
+++ b/lib/Basic/FileSystemStatCache.cpp
@@ -113,7 +113,7 @@
     return Result;
   
   // Cache file 'stat' results and directories with absolutely paths.
-  if (!S_ISDIR(StatBuf.st_mode) || llvm::sys::Path(Path).isAbsolute())
+  if (!S_ISDIR(StatBuf.st_mode) || llvm::sys::path::is_absolute(Path))
     StatCalls[Path] = StatBuf;
   
   return Result;