update ext script (#986)

Arch & Artix already have the `libarchive` pkg, which contains `bsdtar`.
So lets just use it, since its superior, faster, it also has easier syntax, and it auto-detects the compression.
btw the .tar.zst was wrong anyhow, so if u wont merge this, dont forget to fix that. from the manual:
```
 -I, --use-compress-program=COMMAND
        Filter data through COMMAND.  It must accept the -d option, for decompression.  The argument can contain command line options.
.....
--zstd Filter the archive through zstd(1).
```
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Hekuran 2021-08-19 13:56:44 +02:00 committed by GitHub
parent f36f2fe539
commit 0a6982f1e1
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@ -24,15 +24,15 @@ fi
if [ -f "$archive" ] ; then
case "$archive" in
*.tar.bz2|*.tbz2) tar xvjf "$archive" ;;
*.tar.xz) tar -xf "$archive" ;;
*.tar.gz|*.tgz) tar xvzf "$archive" ;;
*.tar.zst) tar -I zstd -xf "$archive" ;;
*.tar.bz2|*.tbz2) bsdtar -xf "$archive" ;;
*.tar.xz) bsdtar -xf "$archive" ;;
*.tar.gz|*.tgz) bsdtar -xf "$archive" ;;
*.tar.zst) bsdtar -xf "$archive" ;;
*.tar) bsdtar -xf "$archive" ;;
*.lzma) unlzma "$archive" ;;
*.bz2) bunzip2 "$archive" ;;
*.rar) unrar x -ad "$archive" ;;
*.gz) gunzip "$archive" ;;
*.tar) tar xvf "$archive" ;;
*.zip) unzip "$archive" ;;
*.Z) uncompress "$archive" ;;
*.7z) 7z x "$archive" ;;