libbinder: fix print format.

            }) {}

    virtual ~VsockSocketAddress() {}

    std::string toString() const override {

        return String8::format("cid %du port %du", mAddr.svm_cid, mAddr.svm_port).c_str();

        return String8::format("cid %u port %u", mAddr.svm_cid, mAddr.svm_port).c_str();

    }

    const sockaddr* addr() const override { return reinterpret_cast<const sockaddr*>(&mAddr); }

    size_t addrSize() const override { return sizeof(mAddr); }