gen-egg-recipes: Add srfi-63 egg
gen-egg-recipes: Add srfi-63 egg

Change-Id: I45b049875a5f525e382c813c168da207b2ecdf96
Signed-off-by: Fabio Berton <698e00bc51ed22392b375ef5a2fc95be5c8355a9@ossystems.com.br>

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