Update DevKit to use mintty v0.9.8.
Update DevKit to use mintty v0.9.8.

haonaturel/rubyinstaller,leonhooijer/rubyinstaller,shirosaki/rubyinstaller,shirosaki/rubyinstaller,dreamauya/rubyinstaller,zorosteven/rubyinstaller,oneclick/rubyinstaller,Rugbyman21/rubyinstaller,auyaauya/rubyinstaller,vemmaverve/rubyinstaller,jaym/rubyinstaller,suvarnaraju/rubyinstaller,oneclick/rubyinstaller,vemmaverve/rubyinstaller,auyaauya/rubyinstaller,zorosteven/rubyinstaller,jahanzaibbahadur/rubyinstaller,suvarnaraju/rubyinstaller,leonhooijer/rubyinstaller,modulexcite/rubyinstaller,jaym/rubyinstaller,dreamauya/rubyinstaller,Rugbyman21/rubyinstaller,modulexcite/rubyinstaller,Rugbyman21/rubyinstaller,haonaturel/rubyinstaller,dreamauya/rubyinstaller,suvarnaraju/rubyinstaller,modulexcite/rubyinstaller,jahanzaibbahadur/rubyinstaller,jahanzaibbahadur/rubyinstaller,shirosaki/rubyinstaller,vemmaverve/rubyinstaller,haonaturel/rubyinstaller,oneclick/rubyinstaller,jaym/rubyinstaller,leonhooijer/rubyinstaller,auyaauya/rubyinstaller,zorosteven/rubyinstaller