1. Removed vcpy_isa.ptx as it should be generated during make
2. Made argument padding specific to hcc path
3. Renamed --gencodeobject to --genco
4. Changed Makefile to work on both nvcc and hcc path
Change-Id: Ifd053d541085d9ce4fd37bc21b07674786c7163e
[ROCm/hip-tests commit: ebc17b0d6e]