Input: UDP Client to provide motion and touch controls

An implementation of the cemuhook motion/touch protocol, this adds the
ability for users to connect several different devices to citra to send
direct motion and touch data to citra.

Co-Authored-By: jroweboy <jroweboy@gmail.com>

src/common/thread.h

@@ -28,6 +28,15 @@ public:
         is_set = false;
     }
 
+    template <class Duration>
+    bool WaitFor(const std::chrono::duration<Duration>& time) {
+        std::unique_lock<std::mutex> lk(mutex);
+        if (!condvar.wait_for(lk, time, [this] { return is_set; }))
+            return false;
+        is_set = false;
+        return true;
+    }
+
     template <class Clock, class Duration>
     bool WaitUntil(const std::chrono::time_point<Clock, Duration>& time) {
         std::unique_lock lk{mutex};