fix websocketsrv.cpp for new apis

lyblsgo

2023-05-10 9eaa9de61afdeb384825a2d6f9bcc2122c9a0804

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add_library(csrc STATIC
        feature-fbank.cc
        feature-functions.cc
        feature-window.cc
        fftsg.c
        mel-computations.cc
        online-feature.cc
        rfft.cc)