Ignore the rpmlint "W: unversioned-explicit-provides".
Ignore the following warnings for bundled ccan-* libraries.
```
ruby.spec:231: W: unversioned-explicit-provides bundled(ccan-build_assert)
ruby.spec:232: W: unversioned-explicit-provides bundled(ccan-check_type)
ruby.spec:233: W: unversioned-explicit-provides bundled(ccan-container_of)
ruby.spec:234: W: unversioned-explicit-provides bundled(ccan-list)
ruby.src:231: W: unversioned-explicit-provides bundled(ccan-build_assert)
ruby.src:232: W: unversioned-explicit-provides bundled(ccan-check_type)
ruby.src:233: W: unversioned-explicit-provides bundled(ccan-container_of)
ruby.src:234: W: unversioned-explicit-provides bundled(ccan-list)
```