1. hipgenisa.sh now adds int main(){} during kernel compilation. User does not have to put it there
2. Renamed vcpy_isa.cpp to vcpy_kernel.cpp
3. Removed vcpy_isa.cu as the kernel code should be common for both paths
4. Changed Makefile and runkernel.cpp to work with above changes
Change-Id: I9f8c84706b44bb500bc493a68e959762b55a0142
[ROCm/hip commit: 4f8c45d05a]
Aditya Atluri