gdk: Fix compilation on macos
After the commit 090cd223, the included
headers started conflicting with the ones that would point to the native ones
one of the issues is that in epoxy *PFNGLTEXIMAGE3DMULTISAMPLEPROC
is used
and on macOS PFNGLTEXIMAGE3DMULTISAMPLEPROC
, by switching to epoxy only includes,
it fixes the issues
Here is a screenshot of it working by running DYLD_LIBRARY_PATH=$PWD/gtk:$PWD/gsk:$PWD/gdk ./demos/widget-factory/gtk4-widget-factory
inside the build folder.