gavl-1.4.0rsvn4256-bp153.1.18

- Fix build in packman 11.4:
  * fix permission denied: add BuildRoot
  * fix rm -rf %doc: change of installation directory for doc

- Update to rsvn4256
- Remove gavl-autoconf.patch (solved in upstream)
- Fix file-contains-date-and-time: add HTML_TIMESTAMP = NO
- Add /bin/gavfdump for package devel

- Run autogen.sh instead of autoconf to fix build in packman 11.4

- fixed the -lm detection to actually work in --as-needed
  scenarios

- Update to 1.4.0
  + Brings a generic metadata container
- Remove gavl-1.2.0-overflow.patch, applied upstream
- Add --without-cpuflags to %configure call

- Initial package