fix encoding: GB2312 -> utf8

Change-Id: I1fc0d86a73615aa80fc9bb17167d6bc5b85088d1
fix encoding: EUC-KR to utf8

Change-Id: I49db117b191af624ce3c300ef13acf48301e9bf3
fix encoding: iso-8859-1 -> utf8

Change-Id: I3643c38345ec253b7c396a67b9f350a51f6aaf40