Update license script to ignore NOTICE.fuchsia file (flutter/engine#34038)

More context at http://fxb/94240

engine/src/flutter/ci/licenses_golden/tool_signature

@@ -1,2 +1,2 @@
-Signature: 1177a4d90f87bc4a0198864901db40ab
+Signature: 808fd97f7e34a2388888f371bb74e2fb
 

engine/src/flutter/tools/licenses/lib/main.dart

@@ -2370,6 +2370,10 @@ class _RepositoryFuchsiaDirectory extends _RepositoryDirectory {
   @override
   bool shouldRecurse(fs.IoNode entry) {
     return entry.name != 'toolchain'
+        // Applies to NOTICE.fuchsia file.
+        // This is a file that covers things that contribute to the Fuchsia SDK.
+        // See: fxb/94240
+        && !(entry.name == 'NOTICE.fuchsia')
         && super.shouldRecurse(entry);
   }