This is defaulted to "" in the build file, and having it here stops per-config args working
Change-Id: I3ce7d6a6abbf781f92d7a99962dea40ad331b161
Reviewed-on: http://gerrit.dmdirc.com/2371
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager