* gnu/packages/glib.scm (glib): Update to 2.37.1. Add Bash and tzdata
as inputs. Remove `glib-tests-timezone.patch'. Augment `pre-build'
phase to set `TZDIR', `XDG_CACHE_HOME', and to modify makefiles to
honor $(TESTS_ENVIRONMENT).
* gnu/packages/patches/glib-tests-desktop.patch,
gnu/packages/patches/glib-tests-homedir.patch: Update.
* gnu/packages/patches/glib-tests-timezone.patch: Remove.
* Makefile.am (dist_patch_DATA): Update accordingly.
* distro/packages/glib.scm: Rename to...
* gnu/packages/glib.scm: ... this. Update module declaration
accordingly.
(dbus): New variable.
(glib): Change version number to 2.34.3, and adjust URL accordingly.
Add a "doc" output. Add #:configure-flags, #:patches, and #:phases
arguments. Add DBUS as an input, as well a three patches.
* Makefile.am (MODULES): Adjust to file renaming.
(dist_patch_DATA): Add `glib-tests-timezone.patch',
`glib-tests-homedir.patch', and `glib-tests-desktop.patch'.