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

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1259564
Original-Revision: dab8c9a7d13f02b8c1067b5ca733775fe238a4de
GitOrigin-RevId: cc3b48ba5b2d201eab7b9248e160fa2cb53e1791
Change-Id: I98c08db817f2071e184bd367b4b141221c2bbb0f
diff --git a/stem b/stem
index 167007f..bbbd4c3 100644
--- a/stem
+++ b/stem
@@ -8,7 +8,7 @@
              root=""
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="55a0c3fb6555295c89dc5569179368fdab1a1f5a"
+             revision="dab8c9a7d13f02b8c1067b5ca733775fe238a4de"
              />
   </imports>
 </manifest>