Common: Add UWP support for helper classes

src/common/timer.cpp

@@ -93,6 +93,7 @@ void Timer::SleepUntil(Value value, bool exact)
     if (diff <= 0)
       return;
 
+#ifndef _UWP
     HANDLE timer = GetSleepTimer();
     if (timer)
     {
@@ -110,6 +111,7 @@ void Timer::SleepUntil(Value value, bool exact)
         return;
       }
     }
+#endif
 
     // falling back to sleep... bad.
     Sleep(static_cast<DWORD>(static_cast<std::uint64_t>(diff) / 1000000));