quartz: Set the name of internal threads.

dlls/quartz/filesource.c

@@ -381,6 +381,8 @@ static DWORD CALLBACK io_thread(void *arg)
     DWORD size;
     BOOL ret;
 
+    SetThreadDescription(GetCurrentThread(), L"wine_qz_async_reader_io");
+
     for (;;)
     {
         ret = GetQueuedCompletionStatus(filter->port, &size, &key, &ovl, INFINITE);

dlls/quartz/filtergraph.c

@@ -1033,6 +1033,8 @@ static DWORD WINAPI message_thread_run(void *ctx)
 {
     MSG msg;
 
+    SetThreadDescription(GetCurrentThread(), L"wine_qz_graph_worker");
+
     /* Make sure we have a message queue. */
     PeekMessageW(&msg, NULL, 0, 0, PM_NOREMOVE);
     SetEvent(message_thread_ret);

dlls/quartz/systemclock.c

@@ -144,6 +144,7 @@ static DWORD WINAPI SystemClockAdviseThread(void *param)
     REFERENCE_TIME current_time;
 
     TRACE("Starting advise thread for clock %p.\n", clock);
+    SetThreadDescription(GetCurrentThread(), L"wine_qz_clock_advise");
 
     for (;;)
     {