travis: add ipaddr for mirage-types.lwt

Signed-off-by: David Scott <dave.scott@citrix.com>
Mbr_partition: applying the functor generates a fresh 'type info'

This isn't ideal but we can work with it.

Signed-off-by: David Scott <dave.scott@citrix.com>
travis: add io-page for mirage-types

Signed-off-by: David Scott <dave.scott@citrix.com>