Fixing GRPC installation

Change-Id: I477e8e5103fe92d64359253ff12dbce3b767d1b7
diff --git a/Jenkinsfile b/Jenkinsfile
index 9ecad5f..9a2a13f 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -32,6 +32,7 @@
           sh returnStdout: true, script: 'cp -r ../../build-files/mkdebian .'
         }
         stage ('Build packages and libraries') {
+          sh returnStdout: true, script: '/bin/bash -c make prereq'
           sh returnStdout: true, script: '/bin/bash -c make'
         }
         stage ('Copy ASFvOLT16 release file to mkdebian folder') {