Clean and ignore additional build files for DocBook documentation
Depending on what generation method is used for the DocBook
documentation, additional build files may be created. One of those
(*.aux) will cause the build to break if one switches from
docbook2pdf to dblatex without deleting it. Update make clean
and .gitignore to remove and ignore these additional files.
Change-Id: I13cc8a3526bd7bc7c4c65cd7d2cd78b094398faa
Reviewed-on: http://gerrit.openafs.org/5089
Tested-by: Derrick Brashear <shadow@dementia.org>
Reviewed-by: Derrick Brashear <shadow@dementia.org>