spec: Do some specfile cleanups

 (*) Don't set, create or destroy the buildroot.

 (*) Use %global rather than %define where possible.

 (*) Automatically create the doc directory and move stuff into it using
     the %doc file macro.

 (*) Don't set a %defattr.

Signed-off-by: David Howells <dhowells@redhat.com>
1 file changed