glib-2.0: upgrade 2.74.6 -> 2.76.2

Drop backports.

Refactor relocate-modules.patch; upstream has implemented the same
logic, but made it os x only - we can simply drop those ifdef guards:
https://gitlab.gnome.org/GNOME/glib/-/commit/af83c6571e47d06468b8162dd29ad57bcf4967a8



Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>