Added missing gl stubs.
Added missing gl stubs.

sergeScherbakov/bgfx,attilaz/bgfx,jdryg/bgfx,cuavas/bgfx,cuavas/bgfx,fluffyfreak/bgfx,ming4883/bgfx,LSBOSS/bgfx,kondrak/bgfx,Extrawurst/bgfx,MikePopoloski/bgfx,jdryg/bgfx,jdryg/bgfx,v3n/bgfx,mendsley/bgfx,LWJGL-CI/bgfx,Vertexwahn/bgfx,kondrak/bgfx,darkimage/bgfx,sergeScherbakov/bgfx,mmicko/bgfx,Synxis/bgfx,LWJGL-CI/bgfx,ocornut/bgfx,v3n/bgfx,LWJGL-CI/bgfx,Synxis/bgfx,attilaz/bgfx,bkaradzic/bgfx,darkimage/bgfx,janstk/bgfx,andr3wmac/bgfx,emoon/bgfx,bkaradzic/bgfx,cyndis/bgfx,ktotheoz/bgfx,0-wiz-0/bgfx,ktotheoz/bgfx,andr3wmac/bgfx,BlueCrystalLabs/bgfx,emoon/bgfx,LSBOSS/bgfx,bkaradzic/bgfx,LWJGL-CI/bgfx,mmicko/bgfx,jdryg/bgfx,mcanthony/bgfx,septag/bgfx,ocornut/bgfx,fluffyfreak/bgfx,Synxis/bgfx,elmindreda/bgfx,fluffyfreak/bgfx,aonorin/bgfx,jpcy/bgfx,jpcy/bgfx,attilaz/bgfx,elmindreda/bgfx,mendsley/bgfx,BlueCrystalLabs/bgfx,v3n/bgfx,septag/bgfx,cyndis/bgfx,Extrawurst/bgfx,Vertexwahn/bgfx,cyndis/bgfx,janstk/bgfx,LSBOSS/bgfx,ming4883/bgfx,emoon/bgfx,mcanthony/bgfx,ktotheoz/bgfx,BlueCrystalLabs/bgfx,fluffyfreak/bgfx,mendsley/bgfx,0-wiz-0/bgfx,marco-we/bgfx,andr3wmac/bgfx,sergeScherbakov/bgfx,marco-we/bgfx,ming4883/bgfx,ocornut/bgfx,MikePopoloski/bgfx,cuavas/bgfx,kondrak/bgfx,MikePopoloski/bgfx,darkimage/bgfx,aonorin/bgfx,aonorin/bgfx,jpcy/bgfx,jpcy/bgfx,0-wiz-0/bgfx,mmicko/bgfx,Extrawurst/bgfx,mcanthony/bgfx,Vertexwahn/bgfx,bkaradzic/bgfx,elmindreda/bgfx,septag/bgfx,marco-we/bgfx,janstk/bgfx