[roll] Roll fuchsia [starnix] Use SNAPSHOT_MODIFIED in clone().

This allows us to avoid mutating the parent's memory
manager when cloning to a new child.

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1192454
Original-Revision: 0d082b2a585be8e585303f6f31724db25a509608
GitOrigin-RevId: 7ff7ac6b7411c2bb2d55a43ecd677c0387da5bf1
Change-Id: I820400069735a3b9dee0b7ab381c491c161720f3

Author: Adam Perry

stem

@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="6bb505dd25ed25fb447b9b9dbf8d134ec7bf5d91"/>
+             revision="0d082b2a585be8e585303f6f31724db25a509608"/>
   </projects>
   <hooks>
     <hook name="install-environment"