Rework module parsing and execution (#4462)

This patch disables automatic detection of module code, and instead
requires the user to explicitly specify whether to parse a source
as a module or as a script.

To achieve this the jerry_parse API function now takes a new option
which signals that the source should be parsed as a module.

JerryScript-DCO-1.0-Signed-off-by: Dániel Bátyai daniel.batyai@h-lab.eu

jerry-core/parser/js/js-scanner.c

@@ -1649,8 +1649,6 @@ scanner_scan_statement (parser_context_t *context_p, /**< context */
         scanner_raise_error (context_p);
       }
 
-      context_p->global_status_flags |= ECMA_PARSE_MODULE;
-
       scanner_context_p->mode = SCAN_MODE_STATEMENT_END;
       lexer_next_token (context_p);
 
@@ -1801,8 +1799,6 @@ scanner_scan_statement (parser_context_t *context_p, /**< context */
         scanner_raise_error (context_p);
       }
 
-      context_p->global_status_flags |= ECMA_PARSE_MODULE;
-
       lexer_next_token (context_p);
 
       if (context_p->token.type == LEXER_KEYW_DEFAULT)