Updated meshoptimizer.
Updated meshoptimizer.

bkaradzic/bgfx,jdryg/bgfx,LWJGL-CI/bgfx,bkaradzic/bgfx,LWJGL-CI/bgfx,jdryg/bgfx,LWJGL-CI/bgfx,jdryg/bgfx,bkaradzic/bgfx,LWJGL-CI/bgfx,bkaradzic/bgfx,jdryg/bgfx