SyntaxError on statement without body

[ShortDevelopment]

According to the Rules of Automatic Semicolon Insertion:

a semicolon is never inserted automatically if the semicolon would then be parsed as an empty statement

Therefore, a poc like in #6351 should throw (inside eval and outside).
But CC didn't handle the (unexpected) "end of the input stream" as a SyntaxError.
This applies to if, for, while, do, ...

---

The parser retrieves the body of such a statement like so:

ChakraCore/lib/Parser/Parse.cpp

Line 10594 in 0a9c082

ParseNodePtr pnodeBody = ParseStatement<buildAST>();

The tkEOF case (inside Parser::ParseStatement) is only hit, if it is unexpected:

ChakraCore/lib/Parser/Parse.cpp

Lines 10169 to 10180 in 0a9c082

	switch (tok)
	{
	case tkEOF:
	if (labelledStatement)
	{
	Error(ERRLabelFollowedByEOF);
	}
	if (buildAST)
	{
	pnode = nullptr;
	}
	break;

In such a case, CC should always throw, even if labelledStatement == false.

---

@rhuanjl

Fix #6351
Fix #6553 (Closed as duplicate)
Fix #5128

Report to tc39: tc39/test262#2661