enable drone arm build

.drone.yml

@@ -16,7 +16,24 @@ steps:
         from_secret: docker_username
       password:
         from_secret: docker_password
+---
+kind: pipeline
+name: build_arm
+platform:
+  os: linux
+  arch: arm
 
+steps:
+  - name: docker
+    image: plugins/docker
+    settings:
+      repo: ducampsv/chainetv
+      auto_tag: "true"
+      auto_tag_suffix: arm
+      username:
+        from_secret: docker_username
+      password:
+        from_secret: docker_password
 ---
 kind: pipeline
 type: docker
@@ -38,21 +55,4 @@ steps:
         - linux/arm
 depends_on:
   - build_amd64
-    #---
-    #kind: pipeline
-    #name: build_arm
-    #platform:
-    #  os: linux
-    #  arch: arm
-    #
-    #steps:
-    #  - name: docker
-    #    image: plugins/docker
-    #    settings:
-    #      repo: ducampsv/chainetv
-    #      auto_tag: "true"
-    #      auto_tag_suffix: arm
-    #      username:
-    #        from_secret: docker_username
-    #      password:
-    #        from_secret: docker_password
+  - build_arm