update capnp

pans

2017-08-09 c4019f7916b6e148e3f9a0e3c7dece422d78c342

 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;