Update for llvm change.

llvm-svn: 317650
diff --git a/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp b/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp
index ac7b616..c9f47af 100644
--- a/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp
+++ b/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp
@@ -1523,10 +1523,10 @@
   unsigned flags = 0;
   if (_file.fileType != llvm::MachO::MH_OBJECT)
     flags = llvm::FileOutputBuffer::F_executable;
-  ErrorOr<std::unique_ptr<llvm::FileOutputBuffer>> fobOrErr =
+  Expected<std::unique_ptr<llvm::FileOutputBuffer>> fobOrErr =
       llvm::FileOutputBuffer::create(path, size(), flags);
-  if (std::error_code ec = fobOrErr.getError())
-    return llvm::errorCodeToError(ec);
+  if (Error E = fobOrErr.takeError())
+    return E;
   std::unique_ptr<llvm::FileOutputBuffer> &fob = *fobOrErr;
   // Write content.
   _buffer = fob->getBufferStart();