roken: configure checks for getaddrinfo and friends

Change-Id: Icb2ace89332024668c9dc4326b967a1015afc1e9
Reviewed-on: http://gerrit.openafs.org/11199
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: D Brashear <shadow@your-file-system.com>