graphics/libGLU: Update to 9.0.1

Update graphics/libGLU to 9.0.1
Add gl and xorg to USES.
portlint

PR: 241568 (in part)
Submitted by: takefu@airport.fm
Obtained from: FreeBSD Graphics Team development repo

		https://github.com/FreeBSDDesktop/freebsd-ports/tree/feature/xorglibs