Replace invalid code 'ber' with valid codes

'ber' is not an ISO 639 code.

The autonyms are taken from the incubators of Wikipedias in this
languages. I also double-checked the spellings, and they are correct.

This also happens to resolve a whitespace problem pointed out in
https://gerrit.wikimedia.org/r/#/c/52376/1/lib/jquery.ime/jquery.ime.js