lto: Fix an inverted conditional which prevented the addition of symbols scraped

from inline assembly, except in cases where they had already been seen (in which
case they would get added twice).
 - I can't see how this ever worked...

llvm-svn: 110757

llvm/tools/lto/LTOModule.cpp

@@ -356,7 +356,7 @@ void LTOModule::addDefinedSymbol(GlobalValue *def, Mangler &mangler,
 
 void LTOModule::addAsmGlobalSymbol(const char *name) {
   // only add new define if not already defined
-  if (_defines.count(name) == 0)
+  if (_defines.count(name))
     return;
 
   // string is owned by _defines