Implement seeking in the pre-scanner info. (#3126)

After changing the lexing position, the current
position of the scanner info must be moved as well.

Fixes #3101
Fixes #3102

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com

jerry-core/parser/js/js-lexer.h

@@ -300,17 +300,6 @@ typedef struct
   uint8_t has_escape;                        /**< has escape sequences */
 } lexer_lit_location_t;
 
-/**
- * Range of input string which processing is postponed.
- */
-typedef struct
-{
-  const uint8_t *source_p;                   /**< next source byte */
-  const uint8_t *source_end_p;               /**< last source byte */
-  parser_line_counter_t line;                /**< token start line */
-  parser_line_counter_t column;              /**< token start column */
-} lexer_range_t;
-
 /**
  * Lexer token.
  */