Add gitignore.
Add gitignore.

newrelic/sidecar,relistan/sidecar,benoahriz/sidecar,newrelic/sidecar,relistan/sidecar,benoahriz/sidecar,Nitro/sidecar,Nitro/sidecar,benoahriz/sidecar,Nitro/sidecar,Nitro/sidecar,newrelic/sidecar,benoahriz/sidecar,relistan/sidecar,newrelic/sidecar