If you just need to include the jar, adding it to your userlib folder in the Mendix project directory should prompt Mendix to include it on build.
Hope this helps.
Thanks. I will try it and let you know
To where should i put new relic yaml file?Should that be also in userlib?
In the following document they mentioned about m2ee.yaml file for NewRelic Configuration.Where does this yml file resides? Can this be edited via the mendix Modeller.