ext_qt: Fix DrMingw being bypassed on qFatal abort
Qt aborts using a fast-fail exception which bypasses DrMingw. Change to use DebugBreak which DrMingw is capable of catching and dumping a backtrace.
Qt aborts using a fast-fail exception which bypasses DrMingw. Change to use DebugBreak which DrMingw is capable of catching and dumping a backtrace.