Fix unexpected plugin packaging
Fix unexpected plugin packaging

Signed-off-by: Kohei Takahashi <1ba2869405d402838da1a0a4909d0d31eaabb39a@flast.jp>

mattn/growl-for-linux,kenhys/growl-for-linux,kenhys/growl-for-linux,mattn/growl-for-linux,xenithorb/growl-for-linux,xenithorb/growl-for-linux