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

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1279925
Original-Revision: 1b7d55019ebb0e58684b13e2dd674a167a0377db
GitOrigin-RevId: 2e3de2eed0771031f67ba8f937a3c035c78337ec
Change-Id: I5234fec51774211800e1c4e6b9ff2da346367802

Author: docs-roller

stem

@@ -8,7 +8,7 @@
              root=""
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="f5ef31be49d19df67f0fbd748e16cb8dc78818f4"
+             revision="1b7d55019ebb0e58684b13e2dd674a167a0377db"
              />
   </imports>
   <projects>