ubik: fix include quotes

Include the generated header in the current directory.

Change-Id: Iaa22fcfd0e22e5f33e7c9bf8a26a838b25668160
Reviewed-on: http://gerrit.openafs.org/10361
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>