fix circleci disabling docker layer caching

.circleci/config.yml

@@ -76,7 +76,7 @@ jobs:
   # -------------------------------------
   publish_docker_linuxamd64:
     machine:
-      docker_layer_caching: true
+      docker_layer_caching: false
     steps:
       - checkout
       - run: git submodule update --init
@@ -92,7 +92,7 @@ jobs:
   # -------------------------------------
   publish_docker_linuxarm32v7:
     machine:
-      docker_layer_caching: true
+      docker_layer_caching: false
     steps:
       - checkout
       - run: git submodule update --init
@@ -108,7 +108,7 @@ jobs:
   # -------------------------------------
   publish_docker_linuxarm32v6:
     machine:
-      docker_layer_caching: true
+      docker_layer_caching: false
     steps:
       - checkout  
       - run: git submodule update --init