vkr: add support for VKR_DEBUG

It is an env var that vkr uses to set the debug flags.  Currently, the
only flag is VKR_DEBUG_VALIDATE that enables the validation layer.

Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
Reviewed-by: Yiwei Zhang <zzyiwei@chromium.org>
1 file changed