COFF: Implement SymbolBody::getDebugName() for DefinedBitcode symbols.

Differential Revision: http://reviews.llvm.org/D10827

llvm-svn: 241029
diff --git a/lld/COFF/InputFiles.cpp b/lld/COFF/InputFiles.cpp
index 2819d39..47a6d0a 100644
--- a/lld/COFF/InputFiles.cpp
+++ b/lld/COFF/InputFiles.cpp
@@ -291,7 +291,8 @@
     } else {
       bool Replaceable = (SymbolDef == LTO_SYMBOL_DEFINITION_TENTATIVE ||
                           (Attrs & LTO_SYMBOL_COMDAT));
-      SymbolBodies.push_back(new (Alloc) DefinedBitcode(SymName, Replaceable));
+      SymbolBodies.push_back(new (Alloc) DefinedBitcode(this, SymName,
+                                                        Replaceable));
     }
   }