Vsync control support for non-win32 platform

[zhykzhykzhyk]

Make changes in native module take effect.
Add a way to turn off vsync in non-win32 platform.

See hrydgard/native#277

[unknownbrackets]

Cool. I'm not sure if we can do the UpdateRunLoop change exactly like that, for two reasons:

1. Blackberry and some other platforms call UpdateRunLoop directly and don't want it to perform time throttling, especially when on devices with 58 or 57 fps native framerates.
2. While paused/loading this might make it burn the CPU again, since you're not checking inited. Not sure.

Maybe it would be better to have a separate throttled function that calls UpdateRunLoop and is called be other places where it makes sense?

-[Unknown]

[zhykzhykzhyk]

1. I think that redundant throttling have no effect on those device, but I have no device to perform the test. (Actually on all devices that have vsync on, time throttling is redundant.)
2. I found it missing.

[unknownbrackets]

@hrydgard what's your opinion? Should we look to rebase this and hrydgard/native#277 into the newly integrated native world?

-[Unknown]

[hrydgard]

Closing this for now, there doesn't seem to be much interest.