vc4: Stash some debug code for looking at what BOs are at what hindex.

When you're debugging validation, it's nice to know what the BOs are for.

src/gallium/drivers/vc4/vc4_bufmgr.c

@@ -106,6 +106,7 @@ vc4_bo_open_name(struct vc4_screen *screen, uint32_t name,
         bo->screen = screen;
         bo->handle = o.handle;
         bo->size = o.size;
+        bo->name = "winsys";
 
 #ifdef USE_VC4_SIMULATOR
         vc4_bo_map(bo);

src/gallium/drivers/vc4/vc4_simulator.c

@@ -75,6 +75,10 @@ vc4_simulator_pin_bos(struct drm_device *dev, struct exec_info *exec)
                 struct vc4_bo *bo = bos[i];
                 struct drm_gem_cma_object *obj = vc4_wrap_bo_with_cma(dev, bo);
 
+#if 0
+                fprintf(stderr, "bo hindex %d: %s\n", i, bo->name);
+#endif
+
                 vc4_bo_map(bo);
                 memcpy(obj->vaddr, bo->map, bo->size);