Update for llvm change.

llvm-svn: 317657
diff --git a/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp b/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp
index c9f47af..7ef0237 100644
--- a/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp
+++ b/lld/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp
@@ -1535,7 +1535,8 @@
     return ec;
   writeSectionContent();
   writeLinkEditContent();
-  fob->commit();
+  if (Error E = fob->commit())
+    return E;
 
   return llvm::Error::success();
 }