Update to STHbench-Dev012.11.sh - c-ray

Changed the c-ray code. 
No more extraneous tee in there. 
Reduced the number of "&&"
Made all tests threaded.
Added echos and labels for the output of each test.

cd c-ray-1.1 && make
	echo "c-ray Easy Test"
	cat scene | ./c-ray-mt -t $threads -s 7500x3500 > foo.ppm 
	echo "c-ray Medium Test"
	cat sphfract | ./c-ray-mt -t $threads -s 1920x1200 -r 8 > foo.ppm
	echo "c-ray Hard Test"
	cat sphfract | ./c-ray-mt -t $threads -s 3840x2160 -r 8 > foo.ppm 
	cd ..