Don't use Vertexarrays

If custom Glcode is used and a buffer is not unbound
the drawcall will take the bound buffer over the
vertex array, so its a bad idea to use them, besides
the fact that in core profile buffers should be used.

Change-Id: I4107d85b664a0c67207652ae34c2569572fa6a8b
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>