Remove extra trailing \s in Makefiles

Remove extra trailing \s in Makefiles

Remove a few extra trailing \s in Makefiles in viced and bozo. Some
'make's (such as the make on HP-UX) interpret this to e.g. include the
following "headers=" stuff to be included in LIBS, which obviously
causes problems.

Change-Id: I7a49ce5b8d40636bb3b4fe7978aa25b5411c7eed
Reviewed-on: http://gerrit.openafs.org/3575
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Tested-by: Derrick Brashear <shadow@dementia.org>
Reviewed-by: Derrick Brashear <shadow@dementia.org>