fixed to adapt gcc-5.4 & glibc-2.25

zhangmeng

2021-07-02 056f71f24cefaf88f2a93714c6678c03ed5f1e0e

 src/shm.cpp

@@ -25,6 +25,7 @@
    mshm_t(open_or_create, name.c_str(), size, 0, AllowAll()),
    name_(name)
{
   pmutex_ = FindOrCreate<Mutex>("ShmSelfControlMutex0");
}

SharedMemory::~SharedMemory()