[roll] Roll fuchsia [gndoc] Update GN build arguments documentation

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1241366
Original-Revision: 16e1f8f59150604a4d4b053760aaeb978748bfb5
GitOrigin-RevId: 8697608df380c28641e6efd6c7fe3138e5281824
Change-Id: I835d33b05d9bc400b159dd0e54b085d47fe0097d
diff --git a/stem b/stem
index ce03895..bc54c7d 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="b2c9cf7b414586d9ea6b1e3e60355560ab63c079"/>
+             revision="16e1f8f59150604a4d4b053760aaeb978748bfb5"/>
   </projects>
   <hooks>
     <hook name="install-environment"