Fix tito git eclass

Fix [#1](https://github.com/sjkingo/gentoo-overlay/issues/1) issue

Installing tito fails with

     *   git.eclass could not be found by inherit()
     * 
     * Call stack:
     *          ebuild.sh, line 545:  Called source '/var/lib/layman/sjkwi/dev-util/tito/tito-9999.ebuild'
     *   tito-9999.ebuild, line   5:  Called inherit 'git' 'distutils'
     *          ebuild.sh, line 257:  Called die
     * The specific snippet of code:
     *   		[[ -z ${location} ]] && die "${1}.eclass could not be found by inherit()"