Related fdo#60338: Setting umask for osl::Directory::open is useless

Maybe 39c58e416252571a04b8ebbb56c9fa012b117993 "INTEGRATION: CWS
olefix: #i46469# use correct umask on unix" had intended to put it around the
osl::Directory::create call instead, but given the trouble of calling umask(3)
in a MT program at all, it is probably better to keep creating any missing
directories with the user's original umask anyway.

Change-Id: Idfddfdab05373a3c395daba635fddcc054f3f215