[WebAssembly] Ensure ArchiveName is set even in the presence of --whole-archive.

Differential Revision: https://reviews.llvm.org/D60431

llvm-svn: 357966
diff --git a/lld/wasm/SymbolTable.cpp b/lld/wasm/SymbolTable.cpp
index 4fe455a..bbce074 100644
--- a/lld/wasm/SymbolTable.cpp
+++ b/lld/wasm/SymbolTable.cpp
@@ -58,7 +58,7 @@
     LTO->add(*F);
 
   for (StringRef Filename : LTO->compile()) {
-    auto *Obj = make<ObjFile>(MemoryBufferRef(Filename, "lto.tmp"));
+    auto *Obj = make<ObjFile>(MemoryBufferRef(Filename, "lto.tmp"), "");
     Obj->parse();
     ObjectFiles.push_back(Obj);
   }