kmeans working for opencl and visc along with timers

.gitignore

llvm/test/VISC/parboil/benchmarks/kmeans/Makefile

...test/VISC/parboil/benchmarks/kmeans/src/opencl/kmeans.cpp

llvm/test/VISC/parboil/benchmarks/kmeans/src/visc/kmeans.cpp

llvm/test/VISC/parboil/datasets/kmeans/input/100

llvm/test/VISC/parboil/datasets/kmeans/input/204800

llvm/test/VISC/parboil/datasets/kmeans/input/819200

.../test/VISC/parboil/datasets/kmeans/input/inpuGen/Makefile

...st/VISC/parboil/datasets/kmeans/input/inpuGen/datagen.cpp

...VISC/parboil/datasets/kmeans/input/inpuGen/gen_dataset.sh

llvm/test/VISC/parboil/datasets/kmeans/input/kdd_cup

llvm/test/VISC/parboil/datasets/kmeans/output/100.out

llvm/test/VISC/parboil/datasets/kmeans/output/204800.out

llvm/test/VISC/parboil/datasets/kmeans/output/819200.out

llvm/test/VISC/parboil/datasets/kmeans/output/kdd_cup.out