Update wsl-appx to version 1 / rev 8 via SR 883758
https://build.opensuse.org/request/show/883758
by user jfkw + dimstar_suse
- Reapply SR 878210: Fix bsc#1179874 Error in parsing the WSL appx package
* Add SHORT_NAME as truncated PRETTY_NAME to comply with AppManifest.xml schema (forwarded request 883757 from jfkw)