D3D12: Fixed initial state for render target.
D3D12: Fixed initial state for render target.

MikePopoloski/bgfx,fluffyfreak/bgfx,fluffyfreak/bgfx,bkaradzic/bgfx,LWJGL-CI/bgfx,attilaz/bgfx,attilaz/bgfx,jpcy/bgfx,attilaz/bgfx,jdryg/bgfx,fluffyfreak/bgfx,septag/bgfx,mendsley/bgfx,jdryg/bgfx,jpcy/bgfx,septag/bgfx,LWJGL-CI/bgfx,jpcy/bgfx,emoon/bgfx,LWJGL-CI/bgfx,jdryg/bgfx,jpcy/bgfx,mendsley/bgfx,bkaradzic/bgfx,fluffyfreak/bgfx,emoon/bgfx,jdryg/bgfx,mendsley/bgfx,septag/bgfx,MikePopoloski/bgfx,bkaradzic/bgfx,LWJGL-CI/bgfx,emoon/bgfx,bkaradzic/bgfx,MikePopoloski/bgfx