Disable T9930fail for the JS target (cf #19174)

testsuite/tests/ghc-e/should_fail/all.T

@@ -12,7 +12,12 @@ test('ghc-e-fail2', req_interp, makefile_test, ['ghc-e-fail2'])
 
 # Don't run on Windows, as executable is written to T9930.exe
 # and no failure is induced.
-test('T9930fail', [extra_files(['T9930']), when(opsys('mingw32'), skip)],
+test('T9930fail',
+     [extra_files(['T9930']),
+      when(opsys('mingw32'), skip),
+      # broken for JS until cross-compilers become stage2 compilers (#19174)
+      # or until we bootstrap with a 9.10 compiler
+      js_broken(19174)],
      makefile_test, ['T9930fail'])
 
 test('T18441fail0', req_interp, makefile_test, ['T18441fail0'])