Stub out explicit MCELFObjectTargetWriter interface.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122067 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/ELFObjectWriter.cpp b/lib/MC/ELFObjectWriter.cpp
index 57ec549..4c67efd 100644
--- a/lib/MC/ELFObjectWriter.cpp
+++ b/lib/MC/ELFObjectWriter.cpp
@@ -1467,7 +1467,8 @@
   }
 }
 
-MCObjectWriter *llvm::createELFObjectWriter(raw_ostream &OS,
+MCObjectWriter *llvm::createELFObjectWriter(MCELFObjectTargetWriter *MOTW,
+                                            raw_ostream &OS,
                                             bool Is64Bit,
                                             Triple::OSType OSType,
                                             uint16_t EMachine,