Add format-bold-Iab image for lang ce

Also use the icon for Chechen. Also requested by Bug: T119716

Add these icons for lang ce

png

https://commons.wikimedia.org/wiki/File:Toolbaricon_bold_%D3%80%D0%B0%D1%8C.png

svg

https://commons.wikimedia.org/wiki/File:Toolbaricon_bold_%D3%80%D0%B0%D1%8C.svg

This was requested at
https://ru.wikipedia.org/wiki/%D0%92%D0%B8%D0%BA%D0%B8%D0%BF%D0%B5%D0%B4%D0%B8%D1%8F:%D0%A4%D0%BE%D1%80%D1%83%D0%BC/%D0%A2%D0%B5%D1%85%D0%BD%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8%D0%B9#.D0.9F.D0.B0.D0.BD.D0.B5.D0.BB.D1.8C

Bug: T119716
Change-Id: I4b41aa53138eae660ebeb9b1d9f6f547cfcca7a4