fix: "example: build UNIX Socket and MQTT for armv7"

related to: #149

buildkite.yml

@@ -21,16 +21,14 @@ steps:
       - docker-compose run hello-world | tee build.log | grep --line-buffered "dummy-logger-output received cloud event with id=3" | exit 0
     timeout_in_minutes: 10
     artifact_paths: "**/build.log"
-  # todo: needs fixing: https://github.com/ce-rust/cerk/issues/149
-  # - label: "example: build  UNIX Socket and MQTT for armv7"
-  #   commands:
-  #     - cd examples/unix_socket_and_mqtt_on_armv7
-  #     - docker build . -t armv7
-  #     - echo "now in $${PWD}"
-  #     - docker run -v $${PWD}/../../:/cerk armv7
-  #   plugins:
-  #     - artifacts#v1.2.0:
-  #         upload: "target/armv7-unknown-linux-gnueabihf/release/unix_socket_and_mqtt_on_armv7"
+  - label: "example: build  UNIX Socket and MQTT for armv7"
+    commands:
+      - cd examples/unix_socket_and_mqtt_on_armv7
+      - docker build . -t armv7
+      - docker run -v $${PWD}/../../:/cerk armv7
+    plugins:
+      - artifacts#v1.2.0:
+          upload: "target/armv7-unknown-linux-gnueabihf/release/unix_socket_and_mqtt_on_armv7"
   - label: "example: execute rule based routing"
     commands: 
       - cd examples/examples/src/rule_based_routing

examples/unix_socket_and_mqtt_on_armv7/Dockerfile

@@ -1,7 +1,7 @@
 FROM ubuntu:18.04
 
 RUN apt-get update
-RUN apt-get install -y curl build-essential llvm clang gcc gcc-7-multilib make cmake lsb-release libssl-dev wget \
+RUN apt-get install -y curl build-essential llvm clang gcc make cmake lsb-release libssl-dev wget \
     && apt-get install -qq gcc-arm-linux-gnueabihf g++-arm-linux-gnueabihf \
     && rm -rf /var/lib/apt/lists/*