Linux: fix whitespace issue

introduced in Change I1e84969b. It does not
follow the overall style.

Change-Id: I5f68fdf425b365d69ee94680cef014de679cf6ff
Reviewed-on: http://gerrit.openafs.org/10529
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>