Fails with the writerperfect/source/writer/exp/txtparai.cxx part of
commit b6f39c47 (EPUB export: initial
index support, 2017-08-15) reverted.

Change-Id: I56457b3e3b312682e4c83ea08dbd459ca42152ef
Reviewed-on: https://gerrit.libreoffice.org/41518Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>