ZenGL 0.3.9

Changelog:
- [Android]fixed problem with 30fps rendering on Nexus and probably other Tegra-based devices
- [Android]added libGLU.so, now triangulation should work
- fixed pengine2d_DelEmitter(removing last emitter)
- fixed col2d_PointInTriangle(random result in some cases)
- fixed joy_Init(amount of joysticks never decreases)
- fixed SND_INFO_DURATION for sounds(always returned 0)

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