GL: Detect autogen mipmap texture format support.
GL: Detect autogen mipmap texture format support.

LWJGL-CI/bgfx,LWJGL-CI/bgfx,jdryg/bgfx,andr3wmac/bgfx,aonorin/bgfx,aonorin/bgfx,andr3wmac/bgfx,attilaz/bgfx,emoon/bgfx,mmicko/bgfx,Synxis/bgfx,MikePopoloski/bgfx,elmindreda/bgfx,attilaz/bgfx,MikePopoloski/bgfx,bkaradzic/bgfx,mendsley/bgfx,elmindreda/bgfx,elmindreda/bgfx,fluffyfreak/bgfx,emoon/bgfx,aonorin/bgfx,jpcy/bgfx,jpcy/bgfx,Synxis/bgfx,attilaz/bgfx,LWJGL-CI/bgfx,bkaradzic/bgfx,LWJGL-CI/bgfx,fluffyfreak/bgfx,mendsley/bgfx,jdryg/bgfx,septag/bgfx,MikePopoloski/bgfx,jdryg/bgfx,mmicko/bgfx,bkaradzic/bgfx,jdryg/bgfx,fluffyfreak/bgfx,mmicko/bgfx,fluffyfreak/bgfx,mendsley/bgfx,Synxis/bgfx,septag/bgfx,andr3wmac/bgfx,bkaradzic/bgfx,emoon/bgfx,jpcy/bgfx,jpcy/bgfx,septag/bgfx