Fix regression test after r10770.

R=yangguo@chromium.org
TEST=cctest/test-regexp/CharacterClassEscapes

Review URL: https://chromiumcodereview.appspot.com/9425050

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10771 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/cctest/test-regexp.cc

@@ -449,6 +449,7 @@ static bool IsWhiteSpace(uc16 c) {
     case 0xA0:
     case 0x2028:
     case 0x2029:
+    case 0xFEFF:
       return true;
     default:
       return unibrow::Space::Is(c);