CHANGE DrawFPS color funtion

[lolyland]

The function to draw fps to the screen is 'DrawFPS(x, y)", but the problem to me is that it only draws it in green. I think it you should be able to choose the color using 'DrawFPS(x, y, color)".

[JupiterRider]

@lolyland There was a PR in the past, but raysan decided not to add it: #1675