budb: Fix objdir builds

Reviewed-on: http://gerrit.openafs.org/4030
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>
(cherry picked from commit 153cb5a3ca34c07a899841ae917b7b882e7ae433)

Change-Id: I46475c58265df9ec2b43241eb244b7d1164ad182
Reviewed-on: http://gerrit.openafs.org/11367
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>