fix english hotwords bug

hnluo

2023-06-26 e83292715fdf3e629f006ad99a177754265e82d4

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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)