Add buck build to pipeline

Change-Id: I47e70f5d037cb931b9dcff68e82463f7ab37e24f
diff --git a/Jenkinsfile b/Jenkinsfile
index 94d373f..8432554 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -3,7 +3,7 @@
     stages {
         stage('build') {
             steps {
-                sh 'buck --version'
+                sh 'buck build onos'
             }
         }
     }