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)
    ```