js files in wp-includes

I just migrated to a new host yesterday.

Today, I received an alert from WordPress letting me know of new files in the wp-includes directory. There are many more, but here are the first few:

wp-includes/js/plupload/plupload.flash.swf
wp-includes/js/plupload/plupload.full.min.js
wp-includes/js/plupload/plupload.silverlight.xap
wp-includes/js/swfupload/plugins/swfupload.cookies.js
wp-includes/js/swfupload/plugins/swfupload.queue.js
wp-includes/js/swfupload/plugins/swfupload.speed.js
wp-includes/js/swfupload/plugins/swfupload.swfobject.js
wp-includes/js/swfupload/swfupload.swf
wp-includes/js/mediaelement/background.png
wp-includes/js/mediaelement/bigplay.png

Can anyone verify these are anything to worry about?

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