Added '-lGLU -lm -lX11 -lXext -lXt' as the extra libraries when checking for glEnable() in libGL.  These should have been used from the start, but it turns out that glEnable() isn't actually in libGL on IRIX--it's in libGLcore.  This may need to be addressed later.
Added '-lGLU -lm -lX11 -lXext -lXt' as the extra libraries when checking
for glEnable() in libGL.  These should have been used from the start, but
it turns out that glEnable() isn't actually in libGL on IRIX--it's in
libGLcore.  This may need to be addressed later.


git-svn-id: 769d22dfa2d22aad706b9a451492fb87c0735f19@777 08b38cba-cd3b-11de-854e-f91c5b6e4272

LiuKeHua/vrjuggler,vrjuggler/vrjuggler,vancegroup-mirrors/vrjuggler,LiuKeHua/vrjuggler,LiuKeHua/vrjuggler,vrjuggler/vrjuggler,vrjuggler/vrjuggler,vancegroup-mirrors/vrjuggler,MichaelMcDonnell/vrjuggler,MichaelMcDonnell/vrjuggler,vancegroup-mirrors/vrjuggler,vancegroup-mirrors/vrjuggler,LiuKeHua/vrjuggler,vrjuggler/vrjuggler,MichaelMcDonnell/vrjuggler,MichaelMcDonnell/vrjuggler,godbyk/vrjuggler-upstream-old,godbyk/vrjuggler-upstream-old,vrjuggler/vrjuggler,LiuKeHua/vrjuggler,LiuKeHua/vrjuggler,MichaelMcDonnell/vrjuggler,MichaelMcDonnell/vrjuggler,vrjuggler/vrjuggler,MichaelMcDonnell/vrjuggler,vrjuggler/vrjuggler,godbyk/vrjuggler-upstream-old,vrjuggler/vrjuggler,LiuKeHua/vrjuggler,godbyk/vrjuggler-upstream-old,MichaelMcDonnell/vrjuggler,vancegroup-mirrors/vrjuggler,godbyk/vrjuggler-upstream-old,LiuKeHua/vrjuggler,godbyk/vrjuggler-upstream-old,vancegroup-mirrors/vrjuggler