Arch Linux

Description:

apr is marked as not reproducible in the official rebuilderd instance [1]. The status can be confirmed locally using archlinux-repro:

```
curl -OL https://archive.archlinux.org/packages/a/apr/apr-1.7.4-1-x86_64.pkg.tar.zst
repro -d apr-1.7.4-1-x86_64.pkg.tar.zst
```

The output of diffoscope [2] clearly shows that the unreproducibility is caused by the hostname being embedded in /usr/share/apr-1/build/libtool.

Since this information is not useful in the first place, the provided patch simply removes that line, as has been done previously in other projects to achieve r-b. After that, the package becomes reproducible.

This can be verified also with archlinux-repro passing the modified PKGBUILD, for example:

```
extra-x86_64-build
repro -d -f apr-1.7.4-2-x86_64.pkg.tar.zst
```

[1]: https://reproducible.archlinux.org/
[2]: https://github.com/archlinux/archlinux-repro
[3]: https://reproducible.archlinux.org/api/v0/builds/529434/diffoscope