- Changed frontend dummy functions' declarations, to be compatible with C.

llvm/include/llvm/SupportVISC/VISCUtils.h

llvm/lib/Transforms/GenVISC/GenVISC.cpp

...C/DNN_Benchmarks/benchmarks/fc_mnist_3/src/fc_mnist_3.cpp

llvm/test/VISC/DNN_Benchmarks/benchmarks/fcl/src/fcl.cpp

llvm/test/VISC/DNN_Benchmarks/common/include/visc.h

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

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

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

llvm/test/VISC/parboil/benchmarks/tpacf/src/visc/main.cc

llvm/test/VISC/parboil/common/include/visc.h