LOKit: set thread name lo_startmain

It is necessary the thread name for debugging LOKit threads.

Change-Id: I713595eb1319234ff90a6eddebcac5ebad912b04

desktop/source/lib/init.cxx

@@ -940,6 +940,8 @@ static bool initialize_uno(const OUString& aAppProgramURL)
 
 static void lo_startmain(void*)
 {
+    osl_setThreadName("lo_startmain");
+
     soffice_main();
 }