packaging fixes

- added *.spec.in, use standard YaST packaging workflow
- removed unused drbd_auto.ycp drbd_proposal.ycp clients
  (were not packaged to RPM)
- racc has been renamed to rubygem-racc
- 2.24.0
cleanup - remove generated files (like Makefile.in)
Merge pull request #1 from yast/build_fixes

Build fixes and cleanup