fix bug: msg.c_str

lyblsgo

2023-04-11 dc8a0445d5460af16e9926a492a85da592f224bb

 funasr/runtime/grpc/CMakeLists.txt

@@ -74,7 +74,7 @@
    "${_target}.cc")
  target_link_libraries(${_target}
    rg_grpc_proto
    rapidasr
    funasr
    ${EXTRA_LIBS}
    ${_REFLECTION}
    ${_GRPC_GRPCPP}