New comment by Eluminae on void-packages repository

https://github.com/void-linux/void-packages/pull/18492#issuecomment-578398517

Comment:
> You can remove `unzip` and the `do_extract` hook, support to extract zip files was added to xbps-src.

I had an issue and by-passed it this way. Maybe there is a better
solution:

```
-%<-
=> Grammalecte-1.6.0_1: extracting distfile(s), please wait...
/void-packages/common/xbps-src/shutils/common.sh: line 31: cd: /builddir/Grammalecte-1.6.0: No such file or directory
=> ERROR: Grammalecte-1.6.0_1: cannot access wrksrc directory [/builddir/Grammalecte-1.6.0]
```

```
void-packages$ ls masterdir/builddir/
grammalecte  grammalecte-cli.py  grammalecte-server.py  LICENSE.fr.txt
LICENSE.txt  README.txt  setup.py
```

The vanila do_extract seems to not extract in a "${pkgname}-${version}"
directory but in the builddir root. Or maybe Grammalecte do not respect
the tree structure in their released zip.

How should we do?