bcmatroska2-5.2.1-bp156.2.5

- Update to 5.2.1 (no changelog).
- Add fix-cmakelist-version.patch
- Add remove-file.patch
- Add fix-libmatroska-cmake.patch

- Remove RPATH to be able to build on Fedora

- changed version from 0.23~git.20210209 to 0.23+git.20210209,
  0.23~git.20210209 is considered older than the previous version 0.23
  and could cause the package not being updated automatically
- fix several RPMLINT warning

- Update to latest commit in order to be able to build the
  latest version of mediastreamer2.
  The 'Provides' field was added because we need mediastreamer2 to
  depend on this latest version of the library, but upstream didn't
  release a new tag.
- Rebase bcmatroska2-include-subdir.patch

- %make_jobs is depricated replaced by %cmake_build

- Remove obsolete Groups tag (fate#326485)

- Modernise spec file

- Initial package.