LPS-46255 - Ant target build-fckeditor should be called on every build-ckeditor target call

Hey @natecavanaugh,

Attached is an update for https://issues.liferay.com/browse/LPS-46255.

NOTE: This is required since when we upgrade the CKEditor, we delete the /portal/portal-web/docroot/html/js/editor/ckeditor folder, but when we run ```ant build-fckeditor``` we move files into the ckeditor folder to get the image browser to work (https://github.com/liferay/liferay-portal/blob/master/portal-web/build.xml#L817..L865) 

Please let me know if you have any questions.  Thanks!