CI: Ensure protos can properly be generated.
CI: Ensure protos can properly be generated.

Signed-off-by: Andrea Luzzardi <442ffe3ffbfd024afcf0b7f8b108d05bca3aae43@gmail.com>

vasil-yordanov/swarmkit,jlhawn/swarmkit,jlhawn/swarmkit,aaronlehmann/swarmkit,cheyang/swarmkit,cezarsa/swarmkit,cezarsa/swarmkit,yp-engineering/swarmkit,alyyousuf7/swarmkit,fate-grand-order/swarmkit,RenaudWasTaken/swarmkit,allencloud/swarmkit,Noyan759/swarmkit,aaronlehmann/swarmkit,runshenzhu/swarmkit,elifa/swarmkit,RenaudWasTaken/swarmkit,sungwonh/swarmkit,docker/swarmkit,yp-engineering/swarmkit,allencloud/swarmkit,sungwonh/swarmkit,yongtang/swarmkit,cheyang/swarmkit,vasil-yordanov/swarmkit,diogomonica/swarmkit,deljuven/swarmkit,dperny/swarmkit-1,AliyunContainerService/swarmkit,diogomonica/swarmkit,dperny/swarmkit-1,fate-grand-order/swarmkit,yongtang/swarmkit,Noyan759/swarmkit,AliyunContainerService/swarmkit,runshenzhu/swarmkit,deljuven/swarmkit,docker/swarmkit,elifa/swarmkit,alyyousuf7/swarmkit