[roll] Roll fuchsia [carnelian][sysmem2] use buffer_collection_token2

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1133195
Original-Revision: ee79a620368e9ea4d26eeb95f967243457a10e58
GitOrigin-RevId: 5a7fd6425c18415ac2adf439419cbb68c218524f
Change-Id: I078862be9d02de625eab171cb168fbee2c8bc6b9

stem

diff --git a/stem b/stem
index 28a002a..634a807 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="e40fb025884f61d69456c29d5cea1d04f1f05ec5"/>
+             revision="ee79a620368e9ea4d26eeb95f967243457a10e58"/>
   </projects>
   <hooks>
     <hook name="install-environment"