Link to provided sysv init scripts

Create symlinks to the evminit, evmserverd and miqtop initscripts.
These are the same scripts used in packaging CFME, and work with a
git-based deployment if BASEDIR=/var/www/miq/vmdb.  The initscripts
should support a local configuration file (ala
/etc/sysconfig/evmserverd) to allow variable customization.  That should
be tracked upstream against cfme.