fix metadata for regexp.prototype.dotall

test/built-ins/RegExp/prototype/dotAll/length.js

test/built-ins/RegExp/prototype/dotAll/name.js

test/built-ins/RegExp/prototype/dotAll/prop-desc.js

...built-ins/RegExp/prototype/dotAll/this-val-invalid-obj.js

test/built-ins/RegExp/prototype/dotAll/this-val-non-obj.js

...-ins/RegExp/prototype/dotAll/this-val-regexp-prototype.js

test/built-ins/RegExp/prototype/dotAll/this-val-regexp.js