Roll Fuchsia GN SDK from p6aF_Vx8H1UngmvaX... to JLBh4Z9PKsjIJcqDU...

If this roll has caused a breakage, revert this CL and stop the roller
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https://autoroll.skia.org/r/fuchsia-gn-sdk-dart-sdk
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is aware of the problem.

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Cq-Include-Trybots: luci.dart.try:vm-fuchsia-release-x64-try;luci.dart.try:vm-fuchsia-release-arm64-try
Change-Id: Ic2d8a2cafb09b231462750997c4daed77edd1b47
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/464840
Reviewed-by: Brian Quinlan <[email protected]>
Reviewed-by: Ryan Macnak <[email protected]>
Commit-Queue: Brian Quinlan <[email protected]>

Author: DEPS Autoroller

DEPS

@@ -593,7 +593,7 @@ deps = {
     "packages": [
       {
       "package": "chromium/fuchsia/gn-sdk",
-      "version": "p6aF_Vx8H1UngmvaXQJELXPaizLy5zDTlT16HDZnj9gC",
+      "version": "JLBh4Z9PKsjIJcqDUDzEL8Q7whJ3CGRd4QmUL6IzizUC",
       }
     ],
     "condition": 'download_fuchsia_deps',