package/libffi: bump to version 3.3
Update hash for license file (update in year:
https://github.com/libffi/libffi/commit/058aa4130445b4ef3c2f77f796c33506873031ca)
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>