xrGame: implement linux _InterlockedCompareExchange()

Author: eagleivg

src/xrGame/GameObject.cpp

@@ -114,8 +114,11 @@ void CGameObject::MakeMeCrow()
     u32 const object_frame_id = dwFrame_AsCrow;
 #ifndef LINUX // FIXME!!!
     if ((u32)_InterlockedCompareExchange((long*)&dwFrame_AsCrow, device_frame_id, object_frame_id) == device_frame_id)
-        return;
+#else
+     if (__sync_val_compare_and_swap((long*)&dwFrame_AsCrow, object_frame_id, device_frame_id) == device_frame_id)
 #endif
+        return;
+
     VERIFY(dwFrame_AsCrow == device_frame_id);
     Props.crow = 1;
     g_pGameLevel->Objects.o_crow(this);