message: Switch to new GenericSignature API
diff: @@ -7665,7 +7665,7 @@ CompilerType SwiftASTContext::GetUnboundGenericType(void *type, size_t idx) {
  if (auto *unbound_generic_type =
  swift_can_type->getAs<swift::UnboundGenericType>()) {
  auto *nominal_type_decl = unbound_generic_type->getDecl();
  - swift::GenericSignature *generic_sig =
  + swift::GenericSignature generic_sig =
  nominal_type_decl->getGenericSignature();
  auto depTy = generic_sig->getGenericParams()[idx];
  return {nominal_type_decl->mapTypeIntoContext(depTy)
  