Related fdo#60338: Create missing temp file dir with user's original umask

For one, that is consistent with how ensuredir (in the same .cxx) has always
worked, and for another saves us from trouble with umask, cf.
034d4c11 "Related fdo#60338: Setting umask for
osl::Directory::open is useless."

Change-Id: Ic3fb5bb29ca3031d257067a514cb9f5bccfbfe4f

unotools/source/ucbhelper/tempfile.cxx

@@ -202,13 +202,7 @@ void CreateTempName_Impl( OUString& rName, bool bKeep, bool bDir = true )
 
         if ( bDir )
         {
-#ifdef UNX /* RW permission for the user only! */
-            mode_t old_mode = umask(077);
-#endif
             FileBase::RC err = Directory::create( aTmp );
-#ifdef UNX
-            umask(old_mode);
-#endif
             if ( err == FileBase::E_None )
             {
                 // !bKeep: only for creating a name, not a file or directory