bugfix: incorrect path to web/view

the upstream has not fixed 1.1.12 flatjar file

https://logstash.jira.com/browse/LOGSTASH-1015
https://logstash.jira.com/browse/LOGSTASH-1067
http://stackoverflow.com/questions/16403031/logstash-web-ui-doesnt-start
Merge pull request #45 from reallyenglish/tomoyukis

bugfix: incorrect path to web/view