[roll] Roll fuchsia [testgen] Change default rust testcase to not return Results

Original-Bug: 85342
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/593282
Original-Revision: 4be2819f3be9c25c1dd9591ff60ce0514d4804f7
GitOrigin-RevId: 479f87e88f86049a751f9c06d056d229ef29bd54
Change-Id: I6e465cb8324758eff065cf2deb0b13c29c451191
diff --git a/stem b/stem
index 5c03f42..259837c 100644
--- a/stem
+++ b/stem
@@ -10,7 +10,7 @@
              githooks=""
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="eafe6357403283214b267dbf3b6c49ea54e1896f"/>
+             revision="4be2819f3be9c25c1dd9591ff60ce0514d4804f7"/>
   </projects>
   <hooks>
     <hook name="install-environment"