Fix appimagetool -g/-u weirdness

CC AppImage/AppImageKit#864

Author: TheAssassin

src/main.cpp

@@ -107,6 +107,8 @@ int main(const int argc, const char* const* const argv) {
         std::cout << "Embedding update information: " << updateInformation << std::endl;
         args.push_back(strdup("-u"));
         args.push_back(updateInformation);
+    } else {
+        args.push_back(strdup("-g"));
     }
 
     if (getenv("SIGN") != nullptr) {
@@ -120,8 +122,6 @@ int main(const int argc, const char* const* const argv) {
     if (getenv("OUTPUT") != nullptr) {
         args.push_back(strdup(getenv("OUTPUT")));
     }
-    
-    args.push_back(strdup("-g"));
 
     args.push_back(nullptr);