
###### JerryScript revision
2.4.0
###### Build platform
ubuntu20.04

### Description
I executed the following test cases and found the resuts of jerry were different from other js engines. 

The first test case should return an array sorted from smallest to largest, but jerry didn't sort the array. 

The second test case takes an empty function as the parameter of sort(), and it should return the original array, while jerry returns a reversed array.

Looking foward to your reply.
### Test case1
```
function foo1() {
  foo2.prototype = arguments;
  new foo2();
}

function foo2() {
  var x = Array.prototype.sort.call(this);
  for (var i = 0; i < x.length; i++) {
    print(x[i]);
  }
}
foo1(3,2,4,1);
```
### Output
3
2
4
1

### Expected behavior
1
2
3
4

### Test case2
```
var a = [3, 2, 4, 1].sort(() => {});
for (var i = 0; i < a.length; i++) {
  print(a[i]);
}
```
### Output
1
4
2
3
### Expected bahavior
3
2
4
1
Two problems in Array.prototype.sort
This is a GitHub Issue
repo:jerryscript
owner:jerryscript-project
Title : Two problems in Array.prototype.sort
Issue date:

--- start body ---

###### JerryScript revision
2.4.0
###### Build platform
ubuntu20.04

### Description
I executed the following test cases and found the resuts of jerry were different from other js engines. 

The first test case should return an array sorted from smallest to largest, but jerry didn't sort the array. 

The second test case takes an empty function as the parameter of sort(), and it should return the original array, while jerry returns a reversed array.

Looking foward to your reply.
### Test case1
```
function foo1() {
  foo2.prototype = arguments;
  new foo2();
}

function foo2() {
  var x = Array.prototype.sort.call(this);
  for (var i = 0; i < x.length; i++) {
    print(x[i]);
  }
}
foo1(3,2,4,1);
```
### Output
3
2
4
1

### Expected behavior
1
2
3
4

### Test case2
```
var a = [3, 2, 4, 1].sort(() => {});
for (var i = 0; i < a.length; i++) {
  print(a[i]);
}
```
### Output
1
4
2
3
### Expected bahavior
3
2
4
1
--- end body ---
