package/waf: add license
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 8c77548fa93e159572e71d4cb2208ab0706aea11)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>