clang: add another unknown flag

Fixes #29141.
gupnp 0.20.11
celt: add universal option

Closes #29133.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
glib: fix more hardcoded paths

Fixes #29014.
Closes #29132.
Closes #29142.
Closes #29143.
glib: update 2.40.0_1 bottle.