[roll] Roll fuchsia [tracing-mutex] Allow suppressing panics for gradual rollout.

Applies bertptrs/tracing-mutex#53 in
advance of an upstream release.

Original-Bug: 461821986
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1430716
Original-Revision: 8b226e6719d5c7f9ca498f1f362c7a98977fbfef
GitOrigin-RevId: 3d5e96e2899d66a1d0081ce456a84ad819eabac6
Change-Id: If8b1f7306e802efa676b811f4e7a9409c7d402a5

Author: Adam Perry

stem

@@ -7,7 +7,7 @@
             manifest="manifests/platform"
             root=""
             remote="https://fuchsia.googlesource.com/fuchsia"
-            revision="61029c596526adbd42915dcf438b209f9e3f66de"/>
+            revision="8b226e6719d5c7f9ca498f1f362c7a98977fbfef"/>
   </imports>
   <projects>
     <project name="cobalt"