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

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1279155
Original-Revision: 341f08a231124cbd33e792290fed79e042ed2361
GitOrigin-RevId: 8415e7de754d93fa2447d6771efdce4e01d96ad6
Change-Id: Ibd0c40e07fa0344d5132018390b2dea15aa6352e

Author: docs-roller

stem

@@ -8,7 +8,7 @@
              root=""
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="50ff0d3398f911adc5100e9f3023dfcf9b22f1c6"
+             revision="341f08a231124cbd33e792290fed79e042ed2361"
              />
   </imports>
   <projects>