Made all benchmarks consistent with timers and use of i64 for node dimensions

llvm/include/llvm/SupportVISC/DFG2LLVM.h

llvm/projects/visc-rt/visc-rt.cpp

llvm/test/VISC/parboil/benchmarks/bfs/Makefile

...C/parboil/benchmarks/bfs/src/opencl_cpu_baseline/main.cpp

...st/VISC/parboil/benchmarks/bfs/src/opencl_nvidia/main.cpp

llvm/test/VISC/parboil/benchmarks/bfs/src/visc/main.cpp

llvm/test/VISC/parboil/benchmarks/cutcp/Makefile

...benchmarks/cutcp/src/opencl_cpu_baseline/cutoff6overlap.c

...rboil/benchmarks/cutcp/src/opencl_nvidia/cutoff6overlap.c

llvm/test/VISC/parboil/benchmarks/cutcp/src/visc/main.cpp

...ISC/parboil/benchmarks/lbm/src/opencl_cpu_baseline/main.c

...test/VISC/parboil/benchmarks/lbm/src/opencl_nvidia/main.c

llvm/test/VISC/parboil/benchmarks/lbm/src/visc/main.cpp

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

...est/VISC/parboil/benchmarks/sgemm/src/opencl_base/main.cc

...t/VISC/parboil/benchmarks/sgemm/src/opencl_cpu_sm/main.cc

...t/VISC/parboil/benchmarks/sgemm/src/opencl_nvidia/main.cc

llvm/test/VISC/parboil/benchmarks/sgemm/src/visc_sh/main.cc

llvm/test/VISC/parboil/benchmarks/spmv/Makefile

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