[Interpreter] Disable mjsunit/readonly test on ignition due to flakes.

test/mjsunit/mjsunit.status

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 776 matching lines @@
   'messages': [SKIP],
   'mirror-object': [SKIP],
   'numops-fuzz-part1': [SKIP],
   'numops-fuzz-part2': [SKIP],
   'numops-fuzz-part3': [SKIP],
   'numops-fuzz-part4': [SKIP],
   'object-literal-gc': [SKIP],
   'osr-elements-kind': [SKIP],
   'property-load-across-eval': [SKIP],
   'proto-accessor': [SKIP],
+  'readonly': [SKIP],
   'regress-3225': [SKIP],
   'regress/clear-keyed-call': [SKIP],
   'regress/regress-102153': [SKIP],
   'regress/regress-1079': [SKIP],
   'regress/regress-109195': [SKIP],
   'regress/regress-1114040': [SKIP],
   'regress/regress-1125': [SKIP],
   'regress/regress-1129': [SKIP],
   'regress/regress-117409': [SKIP],
   'regress/regress-1177809': [SKIP],
@@ skipping 217 matching lines @@
   'regress/regress-634-debug': [SKIP],
   'regress/regress-78270': [SKIP],
   'regress/regress-crbug-347903': [SKIP],
   'regress/short-circuit': [SKIP],
   'stack-traces-overflow': [SKIP],
   'unicodelctest': [SKIP],
   'unicodelctest-no-optimization': [SKIP],
 }],  # ignition == True and arch == arm and mode == debug
 
 ]