Merge bind-lite-devel into bind-devel
    
    Those packages were very similar in BIND 9.11. Because nothing requires
    just bind-lite-devel package, make just one devel package with all
    requirements.  Keep separated libraries, but only one devel package.
    
    Include also obsolete for automatic uninstall of previous bind-lite-devel
    package. bind-devel now contains everything required to link against
    libraries.