Added -lm to linker (avoids MesaGL link failure)
Added -lm to linker (avoids MesaGL link failure)


bcampbell/DevIL,DentonW/DevIL,Agadoul/DevIL,DentonW/DevIL,bcampbell/DevIL,DentonW/DevIL,bcampbell/DevIL,Agadoul/DevIL,DentonW/DevIL,Agadoul/DevIL,Agadoul/DevIL,Agadoul/DevIL,bcampbell/DevIL,DentonW/DevIL,Agadoul/DevIL,DentonW/DevIL,bcampbell/DevIL,bcampbell/DevIL