Reduce ecma_{ref, deref}_object calls while using ecma_builtin_get (#2616)

The following stucture was highly frequented in the code base:

 - Get a builtin object // This operation increases the reference count of the object
 - Use it for create a new object
 - Deref the builtin object

After a builtin has been instantiated there is always at least one reference to "keep it alive",
so increase/decrease the reference count for getting the value only is unnecessary.

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu

jerry-core/api/jerry.c

@@ -596,8 +596,9 @@ jerry_value_t
 jerry_get_global_object (void)
 {
   jerry_assert_api_available ();
-
-  return ecma_make_object_value (ecma_builtin_get (ECMA_BUILTIN_ID_GLOBAL));
+  ecma_object_t *global_obj_p = ecma_builtin_get_global ();
+  ecma_ref_object (global_obj_p);
+  return ecma_make_object_value (global_obj_p);
 } /* jerry_get_global_object */
 
 /**
@@ -3177,7 +3178,6 @@ jerry_create_typedarray (jerry_typedarray_type_t type_name, /**< type of TypedAr
                                                                         prototype_obj_p,
                                                                         element_size_shift,
                                                                         lit_id);
-  ecma_deref_object (prototype_obj_p);
 
   JERRY_ASSERT (!ECMA_IS_VALUE_ERROR (array_value));
 
@@ -3232,7 +3232,6 @@ jerry_create_typedarray_for_arraybuffer_sz (jerry_typedarray_type_t type_name, /
   ecma_value_t array_value = ecma_op_create_typedarray (arguments_p, 3, prototype_obj_p, element_size_shift, lit_id);
   ecma_free_value (arguments_p[1]);
   ecma_free_value (arguments_p[2]);
-  ecma_deref_object (prototype_obj_p);
 
   return jerry_return (array_value);
 #else /* CONFIG_DISABLE_ES2015_TYPEDARRAY_BUILTIN */