[roll] Roll fuchsia [audio][tools] Benchmark profiler update

Increase the default runs-per-scenario to 100, so by default we execute
for one second.

Use -5 dB instead of unity gain, when benchmarking "constant gain".

When benchmarking "new ramp upon every mix", first also apply a
discontinuous gain change.

Add an option to omit the verbose legend.

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/647329
Original-Revision: 97e6d6cb163f4f56aea56a8d73a78bca709c0ac7
GitOrigin-RevId: 769100f2e4daa91f3eb07f31ecbfdb10422e990b
Change-Id: Ib59d15c33ce6ed8d46f5c334fa2f55ce72918235
diff --git a/stem b/stem
index 930d026..73cf6be 100644
--- a/stem
+++ b/stem
@@ -10,7 +10,7 @@
              githooks=""
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="ac73e29369e485dcf44c74d0b0ab7fd9adddb134"/>
+             revision="97e6d6cb163f4f56aea56a8d73a78bca709c0ac7"/>
   </projects>
   <hooks>
     <hook name="install-environment"