misplaced test from 5a454e5ed3f1: should be Linux only

Change-Id: I32df6241f9b1259f1b563826a0d0b8e468ecf4bc
Reviewed-on: https://gerrit.libreoffice.org/10997
Reviewed-by: David Tardon <dtardon@redhat.com>
Tested-by: David Tardon <dtardon@redhat.com>