Tweak instructions for Swift executable (#2001)
Tweak instructions for Swift executable (#2001)

The `--rm` switch will automatically delete the container once it exits,
which is tidier.
jeremiaswerner/openwhisk,rabbah/openwhisk,devbv/incubator-openwhisk,style95/openwhisk,akrabat/openwhisk,rabbah/openwhisk,akrabat/openwhisk,jasonpet/openwhisk,sven-lange-last/openwhisk,sven-lange-last/openwhisk,prccaraujo/openwhisk,jasonpet/openwhisk,style95/openwhisk,prccaraujo/openwhisk,rabbah/openwhisk,paulcastro/openwhisk,prccaraujo/openwhisk,xin-cai/openwhisk,csantanapr/incubator-openwhisk,tysonnorris/openwhisk,lzbj/openwhisk,lzbj/openwhisk,style95/openwhisk,sven-lange-last/openwhisk,rabbah/openwhisk,jeremiaswerner/openwhisk,openwhisk/openwhisk,lzbj/openwhisk,domdom82/openwhisk,cbickel/openwhisk,cbickel/openwhisk,cbickel/openwhisk,jeremiaswerner/openwhisk,CrowdFlower/incubator-openwhisk,xin-cai/openwhisk,RSulzmann/openwhisk,sven-lange-last/openwhisk,devbv/incubator-openwhisk,jasonpet/openwhisk,csantanapr/incubator-openwhisk,domdom82/openwhisk,dubeejw/openwhisk,houshengbo/openwhisk,domdom82/openwhisk,houshengbo/openwhisk,jeremiaswerner/openwhisk,RSulzmann/openwhisk,xin-cai/openwhisk,akrabat/openwhisk,devbv/incubator-openwhisk,markusthoemmes/openwhisk,tysonnorris/openwhisk,RSulzmann/openwhisk,duynguyen/incubator-openwhisk,CrowdFlower/incubator-openwhisk,style95/openwhisk,devbv/incubator-openwhisk,houshengbo/openwhisk,csantanapr/incubator-openwhisk,markusthoemmes/openwhisk,csantanapr/incubator-openwhisk,duynguyen/incubator-openwhisk,paulcastro/openwhisk,duynguyen/incubator-openwhisk,cbickel/openwhisk,prccaraujo/openwhisk,paulcastro/openwhisk,duynguyen/incubator-openwhisk,dubeejw/openwhisk,starpit/openwhisk,houshengbo/openwhisk,openwhisk/openwhisk,tysonnorris/openwhisk,markusthoemmes/openwhisk,style95/openwhisk,RSulzmann/openwhisk,domdom82/openwhisk,duynguyen/incubator-openwhisk,paulcastro/openwhisk,dubeejw/openwhisk,style95/openwhisk,csantanapr/incubator-openwhisk,RSulzmann/openwhisk,starpit/openwhisk,markusthoemmes/openwhisk,akrabat/openwhisk,CrowdFlower/incubator-openwhisk,paulcastro/openwhisk,openwhisk/openwhisk,markusthoemmes/openwhisk,openwhisk/openwhisk,xin-cai/openwhisk,CrowdFlower/incubator-openwhisk,jasonpet/openwhisk,jeremiaswerner/openwhisk,markusthoemmes/openwhisk,akrabat/openwhisk,prccaraujo/openwhisk,akrabat/openwhisk,rabbah/openwhisk,lzbj/openwhisk,style95/openwhisk,csantanapr/incubator-openwhisk,lzbj/openwhisk,starpit/openwhisk,openwhisk/openwhisk,rabbah/openwhisk,xin-cai/openwhisk,jeremiaswerner/openwhisk,jeremiaswerner/openwhisk,dubeejw/openwhisk,paulcastro/openwhisk,paulcastro/openwhisk,jasonpet/openwhisk,starpit/openwhisk,cbickel/openwhisk,sven-lange-last/openwhisk,devbv/incubator-openwhisk,jasonpet/openwhisk,CrowdFlower/incubator-openwhisk,jasonpet/openwhisk,domdom82/openwhisk,tysonnorris/openwhisk,lzbj/openwhisk,markusthoemmes/openwhisk,houshengbo/openwhisk,domdom82/openwhisk,RSulzmann/openwhisk,xin-cai/openwhisk,sven-lange-last/openwhisk,starpit/openwhisk,akrabat/openwhisk,cbickel/openwhisk,houshengbo/openwhisk,tysonnorris/openwhisk,tysonnorris/openwhisk,starpit/openwhisk,sven-lange-last/openwhisk,csantanapr/incubator-openwhisk,houshengbo/openwhisk,dubeejw/openwhisk,rabbah/openwhisk,prccaraujo/openwhisk,markusthoemmes/openwhisk,cbickel/openwhisk,CrowdFlower/incubator-openwhisk,dubeejw/openwhisk,prccaraujo/openwhisk,RSulzmann/openwhisk,tysonnorris/openwhisk,openwhisk/openwhisk