Windows: HAVE_TIMEGM provided by roken

Change-Id: I110e0667cdc68ab0877fe8c1d0a4f9e48e60621d
Reviewed-on: http://gerrit.openafs.org/10067
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Windows: afsrpc.dll export afs_set_com_err_hook

Change-Id: Icbd33c9ca087e663d2755a7a6c8380de266ee717
Reviewed-on: http://gerrit.openafs.org/10068
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>