add jsoncpp lib

houxiao

2017-08-10 0099eb30902a61a6cfb09d6c899a408cd25b0a5e

 VisitFace/RtspNativeCodec/app/libs/capnproto/include/kj/thread.h

@@ -53,7 +53,10 @@

private:
  struct ThreadState {
    ThreadState(Function<void()> func);

    Function<void()> func;
    Function<void(Function<void()>)> initializer;
    kj::Maybe<kj::Exception> exception;

    unsigned int refcount;