[BUG] BSDTAR can't add archive to itself warning

### Configuration
- Keka version: 1.2.52 (4882)
- macOS version: 10.15.7

### Describe the bug
During compression, "Can't add archive to itself" is repeated many times if you check the operation log. It seems to create the archive regardless, at least and is non-fatal.

[Keka_2022-03-04-124525884.log](https://github.com/aonez/Keka/files/8188690/Keka_2022-03-04-124525884.log)

### To Reproduce
Steps to reproduce the behavior:
1. Drag folder onto Zstd tab, fast, delete after compression (other tabs untested)
2. During compression, check the operation log and you'll see "Can't add archive to itself"
3. I should note I have "save next to original file" enabled.

### Expected behavior
I'm guessing it's just a glitch trying to add the archive to the archive?

### Screenshots