See <https://bugzilla.gnome.org/show_bug.cgi?id=776504> for the license change.
* gnu/packages/patches/glib-respect-datadir.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register it.
* gnu/packages/glib.scm (glib): Update to 2.54.1.
[source](patches): Add 'glib-respect-datadir.patch'.
[arguments]<#:phases>: Re-enable timezone test.
[license]: Change to LGPL2.1+.
Marius Bakke