llvmpipe: restore call to lp_setup_update_state()

This undoes part of commit 8be645d53a
and fixes fd.o bug 28822 as well as other regressions.

The 'draw' module may issue additional state-change commands while
we're inside the draw_arrays/elements() call so it's important to
check for updated state at this point.

src/gallium/drivers/llvmpipe/lp_setup_vbuf.c

@@ -60,6 +60,12 @@ static const struct vertex_info *
 lp_setup_get_vertex_info(struct vbuf_render *vbr)
 {
    struct lp_setup_context *setup = lp_setup_context(vbr);
+
+   /* Vertex size/info depends on the latest state.
+    * The draw module may have issued additional state-change commands.
+    */
+   lp_setup_update_state(setup);
+
    return setup->vertex_info;
 }