upgrade source to 2.0.8

Edward Rudd

2018-08-19 561f0d614098a95527367cc3f911e476f35643d6

 source/test/testautomation_timer.c

@@ -104,7 +104,7 @@
}

/* Test callback */
Uint32 _timerTestCallback(Uint32 interval, void *param)
Uint32 SDLCALL _timerTestCallback(Uint32 interval, void *param)
{
   _timerCallbackCalled = 1;