fix use ssh in ci script

.gitlab-ci.yml

@@ -2,6 +2,16 @@ stages:
         - hello
         - build
 
+before_script:
+        - echo "Prepare ssh environment"
+        - eval $(ssh-agent -s)
+        - echo "$SSH_PRIVATE_KEY" | ssh-add
+        - mkdir -p ~/.ssh
+        - chmod 700 ~/.ssh
+        - ssh-keyscan gitlab.com >> ~/.ssh/known_hosts
+        - chmod 644 ~/.ssh/known_hosts
+        - echo "Preparing ssh environment done"
+
 job1:
         stage: hello
         tags:
@@ -38,12 +48,6 @@ job3:
                 - apt install -y msp430-libc
                 - apt install -y binutils-msp430
                 - apt install -y gcc-msp430
-                - eval $(ssh-agent -s)
-                - echo "$SSH_PRIVATE_KEY" | ssh-add
-                - mkdir -p ~/.ssh
-                - chmod 700 ~/.ssh
-                - ssh-keyscan gitlab.com >> ~/.ssh/known_hosts
-                - chmod 644 ~/.ssh/known_hosts
         script:
                 - make clean
                 - make all