Restore the various filter in rpmlintrc: they are useful to check srpm
and rpm files.
Update mrel to test to srpm and rpm files. Make a first test that
checks srpm and spec file. This test ignores the unused-rpmlintrc
warning, as it does not test rpm files. Then make a second test after
building the rpm files. This second test checks all files (spec, srpm
and rpms) to take into account any real unused-rpmlintrc issue.
Signed-off-by: Xavier Delaruelle <xavier.delaruelle@cea.fr>