2de1129510
This will update the hipcc script so that it will use HIP_PLATFORM, HIP_COMPILER, and HIP_RUNTIME variables correctly based on updated hipconfig file. Removing HIP_PLATFORM=clang, only use hcc and nvcc for now. HIP_PLATFORM should eventually switch to amd or nvcc. Change-Id: Ie527d07a1add974cc3aab8e9f61b0518147d7602