[roll] Roll fuchsia [assembly] GN product configs are in hermetic dirs

fxr/1191637 added this support to Bazel.
Now we do it for GN.

Original-Bug: 390189313
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1192904
Original-Revision: 01d2db0af871034a41a9502131b988d5f18ca9b3
GitOrigin-RevId: ec53ffeedac66b03457b9b94bf11fc827bbc8fa2
Change-Id: I8f5d689164869e7a44a2dc028730997b6d0bba88

Author: Aidan Wolter

stem

@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="3ea3a7b92d443f129513b8318e6db0949a869a6a"/>
+             revision="01d2db0af871034a41a9502131b988d5f18ca9b3"/>
   </projects>
   <hooks>
     <hook name="install-environment"