Add drone + build motsognir

Signed-off-by: Christian Richter <crichter@owncloud.com>

.drone.star

@@ -18,7 +18,7 @@ def stepPR(arch):
         },
         "steps": [
             {
-                "name": "build-image-%s" % (arch),
+                "name": "build-and-push-image-%s" % (arch),
                 "image": "plugins/docker",
                 "settings": {
                     "dockerfile": "motsognir/Dockerfile",
@@ -52,7 +52,7 @@ def stepMergeMaster(arch):
         },
         "steps": [
             {
-                "name": "build-build-and-publish-image-%s" % (arch),
+                "name": "build-image-%s" % (arch),
                 "image": "plugins/docker",
                 "settings": {
                     "dockerfile": "motsognir/Dockerfile",