[regexp] fix /\W/ui wrt \u017f and \u212a.

test/mjsunit/mjsunit.status

 # Copyright 2012 the V8 project authors. All rights reserved.
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 # modification, are permitted provided that the following conditions are
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@@ skipping 138 matching lines @@
   'numops-fuzz-part*': [PASS, ['mode == debug', SLOW]],
   'readonly': [PASS, SLOW],
   'regress/regress-1200351': [PASS, SLOW],
   'regress/regress-crbug-474297': [PASS, ['gc_stress == False', SKIP]],
   'es6/tail-call-megatest*': [PASS, SLOW, FAST_VARIANTS, ['tsan', SKIP]],
 
   # case-insensitive unicode regexp relies on case mapping provided by ICU.
   'es6/unicode-regexp-ignore-case': [PASS, ['no_i18n == True', FAIL]],
   'es6/unicode-regexp-ignore-case-noi18n': [FAIL, ['no_i18n == True', PASS]],
   'regress/regress-5036': [PASS, ['no_i18n == True', FAIL]],
+  'es7/regexp-ui-word': [PASS, ['no_i18n == True', FAIL]],
   # desugaring regexp property class relies on ICU.
   'harmony/regexp-property-*': [PASS, ['no_i18n == True', FAIL]],
 
   # noi18n build cannot parse characters in supplementary plane.
   'harmony/regexp-named-captures': [PASS, ['no_i18n == True', FAIL]],
 
   # Allocates a large array buffer, which TSAN sometimes cannot handle.
   'regress/regress-599717': [PASS, ['tsan', SKIP]],
 
   # TODO(bmeurer): Flaky timeouts (sometimes <1s, sometimes >3m).
@@ skipping 482 matching lines @@
   'lithium/*': [SKIP],
   'third_party/*': [SKIP],
   'tools/*': [SKIP],
   'apply': [SKIP],
   'math-*': [SKIP],
   'unicode-test': [SKIP],
   'whitespaces': [SKIP],
 }],  # variant == wasm_traps
 
 ]