New icon for 2 assets

## Assets
```
52d77159096eed69c73862a30b0d4012b88cedf92d518f98bc5fc8d34b6c27c9

0db21df3ca7d71f0fb9aafb019e67d0a23c3c79a11eb9e8c4e32e1cb5910e2da
```
## Icon
![exo_token_icon](https://user-images.githubusercontent.com/22540533/109146292-f1f89580-7763-11eb-8590-7801119338f9.png)

