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

Roller-URL: https://ci.chromium.org/b/8748465170785716609
CQ-Do-Not-Cancel-Tryjobs: true
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1045227
Original-Revision: 98ecb0f14f9523cac946003892db1d1d35f4ac50
GitOrigin-RevId: 6d8c44f9889e171c466cd3021f44f799a737992e
Change-Id: I5a3e649b70dd330bb926c51e1d4a78f9ead7b202
diff --git a/stem b/stem
index dc430d6..62a20be 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="fe46a8c280362637fa5b2882393af0de28bbf780"/>
+             revision="98ecb0f14f9523cac946003892db1d1d35f4ac50"/>
   </projects>
   <hooks>
     <hook name="install-environment"