[Lcdproc] fix for missing kvm.h in lcdproc CVS on Mac OS X 10.5

[Jeremy Ehrhardt]

I had to remove the line
#include <kvm.h>
from lcdproc/clients/lcdproc/machine_Darwin.c to compile lcdproc as 
pulled from CVS an hour ago. Mac OS X 10.5 doesn't seem to have libkvm, 
but machine_Darwin.c doesn't use it anyway.

Jeremy Ehrhardt