Support __halt_compiler as a member of the top level statements

[TysonAndre]

This would allow validation test suites to pass again

• On the top level scope, emit a new HaltCompilerStatement with haltCompilerToken, openParen, closeParen, semicolonToken, and data of type T_INLINE_HTML
• It's a compile error on an inner statement, so not really important to parse it, but that would be with a MissingToken for data if it was parsed in an inner statement.

// Zend/zend_language_parser.y
top_statement:
//  ....
	|	T_HALT_COMPILER '(' ')' ';'
			{ $$ = zend_ast_create(ZEND_AST_HALT_COMPILER,
			      zend_ast_create_zval_from_long(zend_get_scanned_file_offset()));
			  zend_stop_lexing(); }

php > var_export(token_get_all('<?php echo 2; __halt_compiler(); ?><?php fake data'));
array (
  0 => 
  array (
    0 => 382,
    1 => '<?php ',
    2 => 1,
  ),
  1 => 
  array (
    0 => 324,
    1 => 'echo',
    2 => 1,
  ),
  2 => 
  array (
    0 => 385,
    1 => ' ',
    2 => 1,
  ),
  3 => 
  array (
    0 => 309,
    1 => '2',
    2 => 1,
  ),
  4 => ';',
  5 => 
  array (
    0 => 385,
    1 => ' ',
    2 => 1,
  ),
  6 => 
  array (
    0 => 363,
    1 => '__halt_compiler',
    2 => 1,
  ),
  7 => '(',
  8 => ')',
  9 => ';',
  10 => 
  array (
    0 => 313,
    1 => ' ?><?php fake data',
    2 => 1,
  ),
)
php > echo token_name(313);
T_INLINE_HTML