TinyMCE: update to 4.1.6+. Adds support for cache-busting when auto-loading JS and CSS. Change the tests to run in /build. Changelog: https://github.com/tinymce/tinymce/blob/master/changelog.txt.
Fixes #30079
Built from https://develop.svn.wordpress.org/trunk@29994


git-svn-id: http://core.svn.wordpress.org/trunk@29735 1a063a9b-81f0-0310-95a4-ce76da25c4cd