OpenBSD support

[ezntek]

trafficstars

Building a raylib-go project right now, and during the build it says # github.com/gen2brain/raylib-go/raylib rcore.c:1041:1: warning: non-void function does not return a value [-Wreturn-type] rcore.c:2648:1: warning: non-void function does not return a value [-Wreturn-type] rcore.c:4431:22: error: use of undeclared identifier 'eglGetProcAddress'

strange, any fixes?

[gen2brain]

This is duplicate of #71. There is nothing strange, bsd is not supported. You are welcome to add the support.

[gen2brain]

Closed in favor of https://github.com/gen2brain/raylib-go/issues/71.