[roll] Roll fuchsia [starnix] Non-blocking files for SocketVsock

Connected SocketVsock files should encapsulate
only non-blocking files, as otherwise reading and
writing simultaneously can result in deadlock.

Original-Bug: 98384
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/676786
Original-Revision: 688bc29f27c28fe1e5d4d74ed220d38b89f4ba60
GitOrigin-RevId: bba7c2024f51d019257b472f3402c9483a1f07b5
Change-Id: I860552d38cc421cc8bdd777ad2687e7fd4acad71
diff --git a/stem b/stem
index e962f54..c61b1b4 100644
--- a/stem
+++ b/stem
@@ -10,7 +10,7 @@
              githooks=""
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="eb069c2da0a66ba0b11b74070df468246c29fc5b"/>
+             revision="688bc29f27c28fe1e5d4d74ed220d38b89f4ba60"/>
   </projects>
   <hooks>
     <hook name="install-environment"