[Export] support gpu inference

wanchen.swc

2023-03-30 cfc4d402093060fe087424b0a6be4e2b2546eae8

 funasr/runtime/python/libtorch/README.md

@@ -31,7 +31,7 @@

    ```shell
    git clone https://github.com/alibaba/FunASR.git && cd FunASR
    cd funasr/runtime/python/funasr_torch
    cd funasr/runtime/python/libtorch
    python setup.py build
    python setup.py install
    ```