jenkinsfile: add missing steps

Change-Id: I0844f54e0f4c4e0785938fa88d1f20bbab9cf757

extras/ci/client-qt-gnulinux/Jenkinsfile

@@ -53,16 +53,18 @@ pipeline {
 
     stages {
         stage('SCM Checkout') {
-            // Wipe workspace and fetch jami-daemon
-            checkout changelog: true, poll: false,
-                scm: [$class: 'GitSCM',
-                    branches: [[name: 'FETCH_HEAD']],
-                    doGenerateSubmoduleConfigurations: false,
-                    extensions: [
-                        [$class: 'CloneOption', noTags: true, reference: '', shallow: true],
-                        [$class: 'WipeWorkspace']],
-                    submoduleCfg: [],
-                    userRemoteConfigs: [[refspec: '${GERRIT_REFSPEC}', url: 'https://${JAMI_GERRIT_URL}/jami-client-qt']]]
+            steps {
+                // Wipe workspace and fetch jami-daemon
+                checkout changelog: true, poll: false,
+                    scm: [$class: 'GitSCM',
+                        branches: [[name: 'FETCH_HEAD']],
+                        doGenerateSubmoduleConfigurations: false,
+                        extensions: [
+                            [$class: 'CloneOption', noTags: true, reference: '', shallow: true],
+                            [$class: 'WipeWorkspace']],
+                        submoduleCfg: [],
+                        userRemoteConfigs: [[refspec: '${GERRIT_REFSPEC}', url: 'https://${JAMI_GERRIT_URL}/jami-client-qt']]]
+            }
         }
 
         stage('Init repository') {