st/mesa: rebind vertex arrays if _NEW_BUFFER_OBJECT is dirty

This fixes piglit/vbo-bufferdata. It's a regression in 7.11.

Reviewed-by: Brian Paul <brianp@vmware.com>

src/mesa/state_tracker/st_draw.c

@@ -650,7 +650,8 @@ st_draw_vbo(struct gl_context *ctx,
    struct pipe_draw_info info;
    unsigned i, num_instances = 1;
    GLboolean new_array =
-         st->dirty.st && (st->dirty.mesa & (_NEW_ARRAY | _NEW_PROGRAM)) != 0;
+      st->dirty.st &&
+      (st->dirty.mesa & (_NEW_ARRAY | _NEW_PROGRAM | _NEW_BUFFER_OBJECT)) != 0;
 
    /* Mesa core state should have been validated already */
    assert(ctx->NewState == 0x0);