Chakracore: BUG: ImportCall is a CallExpression, it can't be preceded by the new keyword

[rwaldron]

Test: https://github.com/tc39/test262/blob/master/test/language/expressions/dynamic-import/syntax/invalid/top-level-no-new-call-expression.js

TL;DR:

new import('');

Is not allowed, per: https://tc39.github.io/proposal-dynamic-import/#sec-left-hand-side-expressions

[rhuanjl]

Note currently this throws a runtime error instead of a syntax error.

Super easy fix could either:
a) check if the last token was new and if so throw here:
https://github.com/Microsoft/ChakraCore/blob/276661f908707e4d2cc6137fe94e6b5422b2b492/lib/Parser/Parse.cpp#L3578-L3583
OR
b) Check if the next token is import here and if so throw:
https://github.com/Microsoft/ChakraCore/blob/276661f908707e4d2cc6137fe94e6b5422b2b492/lib/Parser/Parse.cpp#L3461

Will submit a PR if wanted when one of my existing ones has been merged. edit: may have got impatient, PR open.