[test] Skip test for arm64 gc stress.

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 373 matching lines @@
   'array-constructor': [PASS, SLOW],
   'json': [PASS, SLOW],
   'regress/regress-446389': [PASS, SLOW],
   'regress/regress-inline-getter-near-stack-limit': [PASS, SLOW],
 
   # BUG(v8:3097)
   'debug-references': [SKIP],
 
   # BUG(v8:4754).
   'debug-referenced-by': [PASS, NO_VARIANTS],
+
+  # BUG(v8:4779): Crashes flakily with stress mode on arm64.
+  'array-splice': [PASS, SLOW, ['arch == arm64', FAST_VARIANTS]],
 }],  # 'gc_stress == True'
 
 ##############################################################################
 ['no_i18n == True and mode == debug', {
   # Tests too slow for no18n debug.
   'regress/regress-1200351': [SKIP],
 }],  # 'no_i18n == True and mode == debug'
 
 ##############################################################################
 ['byteorder == big', {
@@ skipping 523 matching lines @@
   # Tests taking too long.
   'array-functions-prototype-misc': [SKIP],
   'strong/implicit-conversions': [SKIP],
   'strong/load-element-mutate-backing-store': [SKIP],
 
   # Stack overflow.
   'big-array-literal': [SKIP],
 }],  # 'gcov_coverage'
 
 ]