docs(hacking): add links to buildtracker/pr-tracking (#12922)

docs/hacking-tips.md

@@ -1,5 +1,10 @@
 A few assorted scripts and tips to make hacking on Lighthouse a bit easier
 
+# Eng team resources
+
+* [LH Build Tracker](https://lh-build-tracker.herokuapp.com/builds/limit/100) - plotted results of [build-tracker](../build-tracker.config.js) [data](../.github/workflows/ci.yml#:~:text=buildtracker)
+* [LH PR Tracking](https://paulirish.github.io/lh-pr-tracking/) - stats about open PRs, collected [daily](https://github.com/paulirish/lh-pr-tracking/blob/master/.github/workflows/update-stats.yml).
+
 ## Evaluate Lighthouse's runtime performance
 
 Lighthouse has instrumentation to collect timing data for its operations. The data is exposed at `LHR.timing.entries`.  You can generate a trace from this data for closer analysis.