BeOS compatibility: gluPerspective should be in libGL

[pulkomandy]

BeOS software relies on GLU stuff to be inside libGL. This includes GLTeapot as well as various screensavers.

[kallisti5]

​http://nehe.gamedev.net/article/replacement_for_gluperspective/21002/ just in-case we have to write it from scratch

libGLU should already be in libGL in Mesa gcc2. libGLU though is not provided in gcc4's mesa libGL as that isn't how it should be long-term.

[pulkomandy]

The current mesa package (rev 6) does not have it. I rebuilt the package using the current haikuporter recipe (rev 8), and there the symbol is found.

I will post more detailed reports for each screensaver when I have more time to investigate.

[pulkomandy]

Fixed now, the package was updated in hrev48011.