There is an updated pull request by oreo639 against master on the void-packages repository

https://github.com/oreo639/void-packages glib
https://github.com/void-linux/void-packages/pull/49446

[WIP] glib: update to 2.80.0.
<!-- Uncomment relevant sections and delete options which are not applicable -->

#### Testing the changes
- I tested the changes in this PR: **briefly**

glib 2.80.0 introduces libgirepository-2.0 and GIRepository-3.0, which unfortunately creates a build cycle between glib and gobject-introspection, although that is supposedly transitory.

Currently only the C components have been moved over to glib. (Notably, g-ir-scanner is missing, which is needed to compile glib's introspection data. An explanation for why along with the proposed remedies can be found in "The hard part" section of the glib issue below.)
The GLib gir files have also been moved to being generated by glib build instead of gobject-introspection build. (hence why gobject-introspection is necessary)

https://discourse.gnome.org/t/dealing-with-glib-and-gobject-introspection-circular-dependency/18701
https://gitlab.gnome.org/GNOME/glib/-/issues/2616
https://docs.gtk.org/girepository/migrating-gi.html

The bootstrap process, while not intentionally, mirrors the one used by gnome-buld-meta: https://gitlab.gnome.org/GNOME/gnome-build-meta/-/blob/master/elements/sdk/glib.bst
(While gobject-introspection technically doesn't need to be rebuilt I did so here due to issues with dependencies, e.g. glib-bootstrap vs glib)

<!--
#### New package
- This new package conforms to the [package requirements](https://github.com/void-linux/void-packages/blob/master/CONTRIBUTING.md#package-requirements): **YES**|**NO**
-->

<!-- Note: If the build is likely to take more than 2 hours, please add ci skip tag as described in
https://github.com/void-linux/void-packages/blob/master/CONTRIBUTING.md#continuous-integration
and test at least one native build and, if supported, at least one cross build.
Ignore this section if this PR is not skipping CI.
-->
<!--
#### Local build testing
- I built this PR locally for my native architecture, (ARCH-LIBC)
- I built this PR locally for these architectures (if supported. mark crossbuilds):
  - aarch64-musl
  - armv7l
  - armv6l-musl
-->


A patch file from https://github.com/void-linux/void-packages/pull/49446.patch is attached