Linux: Add missing semi-colon

Add a missing semi-colon in the error case when missing symbols
are detected.  The effect is strictly cosmetic - a few additional
error messages would follow the "undefined symbols" error.

Reviewed-on: http://gerrit.openafs.org/9095
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>
(cherry picked from commit 50879d5727c183982a40bd242d6039ed470d835d)

Change-Id: If2c1be51969131794cb2ea30f96490fce95b0103
Reviewed-on: http://gerrit.openafs.org/9365
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Paul Smeddle <paul.smeddle@gmail.com>
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>