Test that the crash when we called print() on a __gc at exit is fixed

scripts/print_on_gc.lua

@@ -0,0 +1,10 @@
+-- Copyright (C) 2019  Igara Studio S.A.
+--
+-- This file is released under the terms of the MIT license.
+-- Read LICENSE.txt for more information.
+
+-- Create global variable which will be GC'd on lua_close()
+a = { }
+
+-- Call print() on __gc, in previous version this produced a crash at exit
+setmetatable(a, { __gc=function() print('gc') end })