Add new subsystem: Stats Reporter.

This subsystem allow Tor users to have a running instance of tor emit
stats events to either graphite or statsd.
1 job for ahf/feature/stats_reporter in 52 minutes and 3 seconds
latest
Status Job ID Name Coverage
  Test
failed #55290733
build

00:52:03

 
Name Stage Failure
failed
build Test
the 'fuzzing-corpora' repository.
SKIP src/test/fuzz_static_testcases.sh (exit status: 77)

SKIP: src/test/test_hs_ntor.sh
==============================

SKIP src/test/test_hs_ntor.sh (exit status: 77)

ERROR: Job failed: exit code 1