Seems that the code in SwGlossaries::GetGlosDoc() expects subdirs
to exist in user config, and would otherwise fail miserably.

Change-Id: I2da6bca46ae5e0d9d90bc23eb710396dbede37f4
Reviewed-on: https://gerrit.libreoffice.org/63798
Tested-by: Jenkins
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>