Run autoconf if configure was out of date. Fixes GH-26
Run autoconf if configure was out of date. Fixes GH-26

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