[roll] Roll fuchsia [build][infra] Establish placeholder //bundles/buildbot/<product>:hermetic_tests groups

For all non-bringup products, establish placeholder buildbot groups for
infra to use when adding hermetic tests to a builder configuration.

Original-Bug: b/298458642
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/911316
Original-Revision: 769fc0b651c914b2b54ce58893916a29dfc94248
GitOrigin-RevId: 75fa7ff1923822fd08856175780f2423dd560b28
Change-Id: Iabf0fbe3671e68c3445eb9f7dbdf75c7a0ee1de3
diff --git a/stem b/stem
index b16c342..f5456c5 100644
--- a/stem
+++ b/stem
@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="515907ee63777c9fb2af4bd228d4b3cbcaf2f252"/>
+             revision="769fc0b651c914b2b54ce58893916a29dfc94248"/>
   </projects>
   <hooks>
     <hook name="install-environment"