Fix clean not working properly any more.

'Clean' needs to do a limited init to load property files, so it
can delete the right build/dist directories.

My earlier change to stop ivy running broke this.

Instead, hard code the damn paths, because making it work sanely
is too difficult.

Change-Id: Id795619aef0188f5eb7f95c9e319bebf06654b08
Reviewed-on: http://gerrit.dmdirc.com/3796
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>