add api BHQueryProcs.

lichao

2021-05-19 34cd75f77d0ca94dbdba4e6cc9451fe4d33e78b3

 src/bh_api.h

@@ -44,6 +44,14 @@
                        int *reply_len,
                        const int timeout_ms);

int BHQueryProcs(const void *remote,
                 const int remote_len,
                 const void *query,
                 const int query_len,
                 void **reply,
                 int *reply_len,
                 const int timeout_ms);

int BHSubscribeTopics(const void *topics,
                      const int topics_len,
                      void **reply,