An interesting complication is that we have to change the ELF type
of the executable from `Linux' to `SVR4', otherwise the
`ld-linux.so.2' trick to override the glibc used doesn't work
(apparently `Linux' is not a recognised ELF type!).
UT doesn't work with software Mesa, so right now we impurily use
`/usr/lib/libGL.so'. I cannot really test whether it works with
hardware Mesa, since it barfs with an error about missing OpenGL
extensions. But that's probably because I'm testing this on an
iBook over an SSH connection to a Linux machine.
svn path=/nixpkgs/trunk/; revision=1047
