Add option to specify path to pygobject override directory
On NixOS every package is installed into it's own immutable prefix under /nix/store
.
gi._overridesdir
will return /nix/store/$hash-python3.7-pygobject-3.30.4/lib/python3.7/site-packages/gi/overrides
which is the prefix of pygobject
and not gom
.
Having a meson option will allow us to install into gom's prefix.
Edited by worldofpeace