Patches for glu on SerenityOS

0001-Build-Remove-pkgconfig.patch

Build: Remove pkgconfig

We can't use pkgconfig here since the OpenGL dependency we find is incompatible with it as an argument.

0002-Build-Do-not-hide-symbols-by-default.patch

Build: Do not hide symbols by default

For some reason, the functions glu exports end up as LOCAL entries in the shared library. Remove this default visibility to set them to GLOBAL.