Parallel build fixes

Parallel build fixes

Assorted fixes for issues seen with parallel builds:
- bucoord must depend on butm, since it uses libbutm
- for most object files in roken and hcrypto, headers must be installed
  before building
- remove rules with 2 targets in rxkad and ubik
- budb: add dependencies for db_dump.o

Change-Id: Ide05f223c2f1fe53bff33cb03011ca47bf741c80
Reviewed-on: http://gerrit.openafs.org/6568
Reviewed-by: Derrick Brashear <shadow@dementix.org>
Tested-by: BuildBot <buildbot@rampaginggeek.com>