Arch Linux

Description:

The `PKGBUILD` of the package extra/libguestfs wants to read in `prepare()` source files outside of `$srcdir`:

```
prepare() {
patch -Np1 -d $pkgname-$pkgver -i ../$pkgname-1.48.1-disable_php_tests.patch
patch -Np1 -d $pkgname-$pkgver -i ../$pkgname-1.48.6-ocaml5.patch
[...]
```

Note that at the beginning of `prepare()`, we start at `$srcdir`, and then a file in ../ is accessed.

This is against the rules of writing packages, and will fail if `$SRCDEST` is set (which is a supported variable by `makepkg`).

Please use `"${srcdir}/<patchfile>"`.

Additional info:
* package version(s): 1.50.1-1

Regards!