panvk: Don't leak shader binaries when loaded from the cache

own_bin needs to be set to true if we want the bin_ptr to be freed.

Fixes: 3d2cc01f8a ("panvk: Add create_shader_from_binary")
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38923>

src/panfrost/vulkan/panvk_vX_shader.c

@@ -1642,6 +1642,7 @@ panvk_deserialize_shader_variant(struct vk_device *vk_dev,
    if (shader->bin_ptr == NULL)
       return panvk_error(device, VK_ERROR_OUT_OF_HOST_MEMORY);
 
+   shader->own_bin = true;
    blob_copy_bytes(blob, (void *)shader->bin_ptr, shader->bin_size);
 
    result = shader_desc_info_deserialize(device, blob, shader);