Rework literal storage.

The new literal storage keeps ecma strings rather than having a
custom string implementation which duplicates the string management
routines. Conversions between string implementations are eliminated
which improved the performance by 4%.

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

jerry-core/parser/js/common.h

@@ -44,7 +44,6 @@
 
 #include "ecma-globals.h"
 #include "ecma-regexp-object.h"
-#include "lit-literal.h"
 #include "jmem-heap.h"
 
 /* Immediate management. */
@@ -90,7 +89,7 @@ typedef struct
 {
   union
   {
-    lit_cpointer_t value;                /**< literal value (not processed by the parser) */
+    jmem_cpointer_t value;               /**< literal value (not processed by the parser) */
     const uint8_t *char_p;               /**< character value */
     ecma_compiled_code_t *bytecode_p;    /**< compiled function or regexp pointer */
     uint32_t source_data;                /**< encoded source literal */