gen-egg-recipes: Add sandbox egg
gen-egg-recipes: Add sandbox egg

Change-Id: Ibb6b625f8a6cf9f06c5ae901ac8232194a276fed
Signed-off-by: Fabio Berton <698e00bc51ed22392b375ef5a2fc95be5c8355a9@ossystems.com.br>

OSSystems/meta-chicken,OSSystems/meta-chicken,OSSystems/meta-chicken