.travis: update multiarch emulation

.travis.yml

@@ -27,5 +27,5 @@ script:
 
 after_success:
   - docker login -u="$DOCKER_USERNAME" -p="$DOCKER_PASSWORD"
-  - docker run --rm --privileged multiarch/qemu-user-static:register
+  - docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
   - make manifest && make manifest-latest