Collect ticky tickers

With the new Shake-based build system nofib can collect performance information from a variety of sources, including:

• RTS metrics
• perf
• cachegrind

However, one useful source that is obviously missing is ticky. With ghc!3085 (merged) the ticky counters can be reported in the eventlog, which makes them easily programmatically. It would be great if nofib could learn to compile its benchmarks with ticky support and slurp up the resulting metrics.