Fix mem leak bug in Create_Thread if FAKE_THREAD_CREATE=True. #6192
Fix mem leak bug in Create_Thread if FAKE_THREAD_CREATE=True. #6192

Create_Thread() is supposed to take responsibility to free() the
memory passed in as the void *arg.  This was not happening
if config knob FAKE_THREAD_CREATE=True, which is the default on Win32.

htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor