travis: add PINS for charrua-client-{lwt,mirage}
travis: add PINS for charrua-client-{lwt,mirage}

Signed-off-by: David Scott <bfcdf3e6ca6cef45543bfbb57509c92aec9a39fb@recoil.org>

haesbaert/hdhcp,haesbaert/charrua-core