Unify the build with RHEL
    
    The gpgme dependency was simplified to prefer pkg-config on
    distributions released after 2016, as opposed to gpgme-config [1].
    
    There's no need to do a build just for this.
    
    [1] Flatpak commit 9b87e4c0d4557f7e
        https://github.com/flatpak/flatpak/commit/9b87e4c0d4557f7e