Add Gerrit@Google slides

Change-Id: Id004cfff01138d2aaed67fd0958d410332780662
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 * Load-balancing decisions and their impact on latency
 * What garbage collection means for load-balancing and vice-versa
 
+## Slides
+
+The slides for this talk can be found [here](https://docs.google.com/presentation/d/1pZkXbrhcUZxO-1TEUJgBvOiJJiYWwtHOw8fegsjvCnc).
 
 *[Patrick Hiesel, Google](../speakers.md#hiesel)*