This is another way to address
<https://github.com/mesonbuild/meson/issues/9492> as suggested by
Nirbheek Chauhan and Paolo Bonzini.
* gnu/packages/patches/network-manager-meson.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/gnome.scm (network-manager)[source]: Use it.
[arguments]: Remove #:meson.
