all_cl.py will now run each OpenCV sub-test individually, and quick_cl.py
will run only the OpenCV parent tests.  Both profiles run the exact same
tests, but all_cl.py gives finer-grained results and also takes longer
due to the overhead of running each sub-test individually.

For example:

./piglit-run.py tests/all_cl.py -t Lut results/lut
[Wed Jan 15 12:08:05 2014] ::  running :: opencv/Arithm/Lut/Mat/2
[Wed Jan 15 12:08:06 2014] ::     pass :: opencv/Arithm/Lut/Mat/2
[Wed Jan 15 12:08:06 2014] ::  running :: opencv/Arithm/Lut/Mat/0
[Wed Jan 15 12:08:06 2014] ::     pass :: opencv/Arithm/Lut/Mat/0
[Wed Jan 15 12:08:06 2014] ::  running :: opencv/Arithm/Lut/Mat/1
[Wed Jan 15 12:08:08 2014] ::     pass :: opencv/Arithm/Lut/Mat/1

./piglit-run.py tests/quick_cl.py -t Lut results/lut-quick
[Wed Jan 15 12:08:14 2014] ::  running :: opencv/Arithm/Lut
[Wed Jan 15 12:08:16 2014] ::     pass :: opencv/Arithm/Lut

Reviewed-by: Dylan Baker <baker.dylan.c@gmail.com>