Support/Path: Deprecate PathV1::IsSymlink and replace all uses with PathV2::is_symlink.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123345 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/PathV2.cpp b/lib/Support/PathV2.cpp
index f2ca34b..e2565d5 100644
--- a/lib/Support/PathV2.cpp
+++ b/lib/Support/PathV2.cpp
@@ -660,6 +660,14 @@
   return status.type() == file_type::symlink_file;
 }
 
+error_code is_symlink(const Twine &path, bool &result) {
+  file_status st;
+  if (error_code ec = status(path, st))
+    return ec;
+  result = is_symlink(st);
+  return success;
+}
+
 bool is_other(file_status status) {
   return exists(status) &&
          !is_regular_file(status) &&