[LLD] [COFF] Fix a condition that was missed in 7f0e6c31c255

[mstorsjo]

Summary

This should fix cases when e.g. auto import is enabled without mingw mode in total being enabled, in combination with LTO.

Not sure if it's worth adding a testcase for this, as it's mostly a benign consistency issue leftover from that commit.

[rnk]

lgtm

lld/COFF/SymbolTable.cpp

for (auto &i : symMap) {
     StringRef name = undef->getName();
     if (name.startswith("__imp_")) {
       Symbol *imp = find(name.substr(strlen("__imp_")));
       if (imp && isa<Defined>(imp))
         continue;
     }
     if (name.contains("_PchSym_"))
       continue;
-    if (config->mingw && impSymbol(name))
+    if (config->autoImport && impSymbol(name))
       continue;
     undefs.insert(sym);
   }
 
   reportProblemSymbols(undefs,
                        /* localImports */ nullptr, ObjFile::instances,
                        &BitcodeFile::instances);
 }