[extract_far] Disable analysis as it keeps changing.

In the time between uploading extract_far and attempting to enable it, new bad analysis warnings were added. Rather than continue to chase these, disable analysis.

Change-Id: I5b5ea6d64f7becef316e765df1d66ea235147dfc
diff --git a/runtime/flutter_runner/kernel/BUILD.gn b/runtime/flutter_runner/kernel/BUILD.gn
index 671a8e3..8fc6ff1 100644
--- a/runtime/flutter_runner/kernel/BUILD.gn
+++ b/runtime/flutter_runner/kernel/BUILD.gn
@@ -157,6 +157,7 @@
   main_dart = "extract_far.dart"
 
   force_prebuilt_dart = true
+  disable_analysis = true
 
   source_dir = "."
   sources = [