db_dump.o depends on budb_errs.h

Add INCLS and budb_errs.h accordingly.

In contrast to master, budb did not have this already.

Reviewed-on: http://gerrit.openafs.org/9996
Reviewed-by: Jeffrey Hutzelman <jhutz@cmu.edu>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>
(cherry picked from commit 7af86ecffb737b050f67908b63f247e8361eacdc)

Change-Id: Id8657c39d58a1f73e07bf5d9a5324cb343b3888b
(cherry picked from commit e6d1db4643d023eda837c8ae37b82b0dc7d5ee4d)
Reviewed-on: http://gerrit.openafs.org/10005
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Mark Vitale <mvitale@sinenomine.net>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>