[roll] Roll fuchsia [audio][tools] Exclude first runs from mixer profile

This is to avoid artificially slow first runs of Mix and ProduceOutput
calls from skewing overall results.

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/686962
Original-Revision: 66a14bb14303446f68f77dce2235eb09617ec271
GitOrigin-RevId: 990ebb57d9cdf878edae37d47208bc249303dafd
Change-Id: I5b8a3a5e90462cc89b273ef09bf0929481ad4844
diff --git a/stem b/stem
index 1310419..675c700 100644
--- a/stem
+++ b/stem
@@ -10,7 +10,7 @@
              githooks=""
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="bd6d5680a26b4e1ccf61c204dd47662a21c41061"/>
+             revision="66a14bb14303446f68f77dce2235eb09617ec271"/>
   </projects>
   <hooks>
     <hook name="install-environment"