Clean up console message

Clean up console message

Clean up the 'all buffers locked' console message so that it's
clear that it comes from AFS, and so it has a trailing newline.

From a bug report by Rainer Toebbicke to openafs-info

Change-Id: I3f69e57e37a91ae3e6e8822ccfe72dddc06b4359
Reviewed-on: http://gerrit.openafs.org/732
Tested-by: Derrick Brashear <shadow@dementia.org>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
(cherry picked from commit 4a006f167bf6fe550eac9c96c6fce1f538760709)
Reviewed-on: http://gerrit.openafs.org/823
Reviewed-by: Dan Hyde <drh@umich.edu>