Narro export extranous files for Search Engines

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Comments from code review. 
"Narro seems to be adding files for search engines in list.txt if there aren't 
any .xml files with the same name in /browser/searchplugins/ directory. Anthow, 
that's a wrong way to do stuff, as we only need files for the search engines we 
don't already have in en-US. So, what you want to do is, create search plugin 
in /browser/searchplugins/ named wikipedia-km.xml and change the `wikipedia` to 
`wikipedia-km` in list.txt file"

Also, I don't understand wht wikipedia-hy.xml is here, at all.

Based on the comments from here:
https://bugzilla.mozilla.org/show_bug.cgi?id=709140#c26

Original issue reported on code.google.com by [email protected] on 3 Feb 2012 at 9:47