[DAP] Add FIR benchmark

[ShiHaoGao]

KFR interface in KFRFir.cpp has been changed.

// old
// expression_pointer<fbase> kaiser = to_pointer(window_kaiser(taps127.size(), 3.0));

// new
expression_handle<float> kaiser = to_handle(window_kaiser<float>(taps127.size(), 3.0));