Set build output and status before after_executes
Set build output and status before after_executes

I'm making altria-ikachan plugin now.

I'd like to change the message depending on the result of the build like this.
https://github.com/mizzy/altria-ikachan/blob/master/lib/altria/ikachan/notifier.rb#L18

r7kamura/altria,r7kamura/altria