Change encoding from EUC-KR to utf8

These files have been converted with this command line:
iconv -f EUC-KR -t utf8 <file> > <tmp file>
For more info, see http://nabble.documentfoundation.org/About-encoding-of-some-files-in-hwpfilter-td4105106.html

Change-Id: Ibb2fc0af465641d6cc9236887addefe8062d4ffe