Linux: print after BUG() is pretty useless

Linux: print after BUG() is pretty useless

Calling BUG() panics the machine, so having a print statement with
further debugging information after it doesn't help much.

Swap the ordering, so we at least see the message.

Change-Id: I3aa3b8ba5faaa40cef7bb046093b322212eea2b8
Reviewed-on: http://gerrit.openafs.org/2754
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>
(cherry picked from commit ff100901e0da8d236c7ae8b4d478600146d8f182)
Reviewed-on: http://gerrit.openafs.org/2802