add a wrapper function for glFramebufferTexture.
some bugs were fixed.
I tested on Ubuntu 14.04(x64) and nVidia 375 driver with VK-GL-CTS
Sorry, I missed build warnings. I will check it.
First I will upload bugfix patches.
Fix build warnings
Do you have a patch for VK-GL-CTS ?
This patch applies cleanly.
@ManMower congratulations, you're now a reviewer.
Deferred until after 1.21 release