Made benchmarks consistent

llvm/test/VISC/parboil/benchmarks/lbm/Makefile

llvm/test/VISC/parboil/benchmarks/sgemm/Makefile

.../parboil/benchmarks/sgemm/src/opencl_cpu_baseline/main.cc

llvm/test/VISC/parboil/benchmarks/sgemm/tools/compare-output

...SC/parboil/benchmarks/spmv/src/opencl_cpu_baseline/main.c

...est/VISC/parboil/benchmarks/spmv/src/opencl_nvidia/main.c

llvm/test/VISC/parboil/benchmarks/spmv/tools/compare-output

...parboil/benchmarks/stencil/src/opencl_cpu_baseline/main.c

llvm/test/VISC/parboil/benchmarks/tpacf/Makefile

llvm/test/VISC/parboil/common/mk/visc.mk