package: don't check case insensitive duplicates for ZIP package

Turns out there's a TexMaths extension that contains files with names
differing only in case.

https://ask.libreoffice.org/t/zipexception-when-installing-an-extension/108256

There isn't a separate ZipPackage mode for OXT so just don't check in
the ZIP mode.

Change-Id: I7680c93f5f24ac566a59b131b36d855bd85100b9
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/170616
Tested-by: Jenkins
Reviewed-by: Michael Stahl <michael.stahl@allotropia.de>
(cherry picked from commit 0fb25ce9ff9a3ede8d43ee1502c44b4c02135b3f)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/170564
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>

0 files changed, 0 insertions, 0 deletions