fix mingw build
fix mingw build

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