suport NVIDIA GPU cc=86

[t-hishinuma]

Compute capabilities of Geforce RTX 30XX is 8.6 : https://developer.nvidia.com/cuda-gpus

but, clang OpenMP is not support CC=86 : https://github.com/llvm/llvm-project/blob/main/openmp/libomptarget/deviceRTLs/nvptx/CMakeLists.txt#L96

We have confirmed that monolish works on RTX3060 with CC = 80.

If CC = 86, compile monolish with CC = 80.
The name of the generated shared library is CC = 86.