Add regular RegExp Unicode property escape tests (#1014)

...roperty-escapes/generated/General_Category_-_Surrogate.js

...p/property-escapes/generated/General_Category_-_Symbol.js

...-escapes/generated/General_Category_-_Titlecase_Letter.js

...operty-escapes/generated/General_Category_-_Unassigned.js

...-escapes/generated/General_Category_-_Uppercase_Letter.js

...lt-ins/RegExp/property-escapes/generated/Grapheme_Base.js

...-ins/RegExp/property-escapes/generated/Grapheme_Extend.js

.../built-ins/RegExp/property-escapes/generated/Hex_Digit.js

.../RegExp/property-escapes/generated/IDS_Binary_Operator.js

...RegExp/property-escapes/generated/IDS_Trinary_Operator.js

...uilt-ins/RegExp/property-escapes/generated/ID_Continue.js

test/built-ins/RegExp/property-escapes/generated/ID_Start.js

...uilt-ins/RegExp/property-escapes/generated/Ideographic.js

...ilt-ins/RegExp/property-escapes/generated/Join_Control.js

...Exp/property-escapes/generated/Logical_Order_Exception.js

.../built-ins/RegExp/property-escapes/generated/Lowercase.js

test/built-ins/RegExp/property-escapes/generated/Math.js

...Exp/property-escapes/generated/Noncharacter_Code_Point.js

...t-ins/RegExp/property-escapes/generated/Pattern_Syntax.js

.../RegExp/property-escapes/generated/Pattern_White_Space.js