[utils] Add new helper for game specific workaround

In the future we might extend this with other features,
such as specific post-install things that some games
may require to work or preconfigured WINE settings.

legendary/utils/game_workarounds.py

@@ -0,0 +1,10 @@
+# coding: utf-8
+
+# games where the download order optimizations are enabled by default
+_optimize_default = {
+    'wombat'
+}
+
+
+def is_opt_enabled(app_name):
+    return app_name.lower() in _optimize_default