[Transforms] should emit comment in namespace only once even though namespace is a identifierPath

[yuit]

namespace hello.hi.world
{
    function foo() {}

    // TODO, blah
}

emitted as

var hello;
(function (hello) {
    var hi;
    (function (hi) {
        var world;
        (function (world) {
            function foo() { }
            // TODO, blah
        })(world = hi.world || (hi.world = {}));
        // TODO, blah
    })(hi = hello.hi || (hello.hi = {}));
    // TODO, blah
})(hello || (hello = {}));