Don't use strlen for string literals (#2517)

Their length (size) is known at compile time. Therefore `sizeof`
is more efficient for them.

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu

tests/unit-core/test-objects-foreach.c

@@ -28,7 +28,7 @@ static const jerry_object_native_info_t test_info =
   .free_cb = free_test_data
 };
 
-static const char *strict_equal_source = "var x = function(a, b) {return a === b;}; x";
+static const jerry_char_t strict_equal_source[] = "var x = function(a, b) {return a === b;}; x";
 
 static bool
 find_test_object_by_data (const jerry_value_t candidate,
@@ -72,8 +72,8 @@ main (void)
   /* Render strict-equal as a function. */
   jerry_value_t parse_result = jerry_parse (NULL,
                                             0,
-                                            (jerry_char_t *) strict_equal_source,
-                                            strlen (strict_equal_source),
+                                            strict_equal_source,
+                                            sizeof (strict_equal_source) - 1,
                                             JERRY_PARSE_STRICT_MODE);
   TEST_ASSERT (!jerry_value_is_error (parse_result));
   jerry_value_t strict_equal = jerry_run (parse_result);