text: Title: [BUG] Cannot install from source
  Body: **Describe the bug**
  $ pip install -vvv --no-build-isolation -e .
      Traceback (most recent call last):
        File "<string>", line 1, in <module>
        File "/home/vic/workspace/AutoGPTQ/setup.py", line 111, in <module>
          local_arch_list = detect_local_sm_architectures()
        File "/home/vic/workspace/AutoGPTQ/setup.py", line 68, in detect_local_sm_architectures
          arch_list[-1] += '+PTX'
      IndexError: list index out of range
  
  **Hardware details**
  24GB RAM, Intel CPU
  
  **Software version**
  python 3.8.5
  
  