changing vietnamese translators on request

Signed-off-by: Werner Macho <werner.macho@gmail.com>

Author: mach0

scripts/tsstat.pl

@@ -87,7 +87,7 @@
         'tl' => 'Kathrina Gregana',
 	'tr' => 'Osman Yalçın YILMAZ, Omur Saygin',
 	'uk' => 'Alexander Bruy',
-	'vi' => 'Phan Anh, Bùi Hữu Mạnh',
+	'vi' => 'Phùng Văn Doanh, Bùi Hữu Mạnh, Nguyễn Văn Thanh, Nguyễn Hữu Phúc, Cao Minh Tu',
 	'zh_CN' => 'Calvin Ngei, Zhang Jun, Richard Xie',
 	'zh-Hans' => 'Calvin Ngei, Lisashen',
 	'zh_TW' => 'Nung-yao Lin',