graphics/libGLU: Switch to meson build
Fixes an issue I caused with pkgconfig
https://gitlab.freedesktop.org/mesa/glu/-/commit/225e00a14a9200f11253775a7c7778c1c29c8b23
PR: 256997
(cherry picked from commit fac2bc519518fc6072e1d042b12cca44afb63568)