Adapt code to new google library

[mike-thompson-day8]

Change this code:
https://github.com/mike-thompson-day8/cljsbuild-none-test-seed/blob/master/test.html#L118-L124

To this:

       var pathToName = {};
        for (var key in goog.dependencies_.nameToPath) {
            var value = goog.dependencies_.nameToPath[key];
            pathToName[value] = key;
        }
        for (var key in goog.dependencies_.requires) {
            if (goog.dependencies_.requires.hasOwnProperty(key)) {
                if (goog.dependencies_.requires[key]["cljs.core"]) {
                    //as key is a path find its namespace
                    goog.require(pathToName[key]);    // will trigger CLOSURE_IMPORT_SCRIPT calls which injectJs into page
                }
            }
        }