[roll] Roll fuchsia [starnix] Promote the Socket's FsNode to a strong reference

Maintaining a weak reference to the Socket's FsNode is unnecessary
since the only reference from FsNode to Socket is from the file-
system node to which a Unix-domain Socket is bound, to the Socket,
and in that case the FsNode differs from the one associated with
the Socket itself.

Holding a strong reference avoids raciness between referencing the
FsNode of a target Socket, and it being torn-down by its owner.

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1261264
Original-Revision: ade556b77559b725156f8d35c13c37ee12b85b88
GitOrigin-RevId: 60f686da0ea90d2f01f244a7c16c771d224b5279
Change-Id: I2850fce8e7b0ec96ef822a9bcec23162fa2fb40d
diff --git a/stem b/stem
index 39e38c4..7bd3b22 100644
--- a/stem
+++ b/stem
@@ -8,7 +8,7 @@
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              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="2a013b88e3e1768fe43f5d623f2bd8a208b2218e"
+             revision="ade556b77559b725156f8d35c13c37ee12b85b88"
              />
   </imports>
 </manifest>