Append a necessary newline in send_to_graphite payload
Append a necessary newline in send_to_graphite payload

It's a critical byte; without the newline the message isn't recorded by
graphite. I found it in the docs: http://docs.hostedgraphite.com/languageguide/lg_python.html

The bug turned up when I started to use this method for tracking default
deployment timings.

Auditors: csilvers

Test Plan:
I use the CLI to send data before and after. Before the change, the data
didn't show up in HostedGraphite. Afterwards, it did.

  PYTHONPATH=. ./alert.py --graphite=chris.test --graphite_value=1

mroth/alertlib,Khan/alertlib