Do not compress .ui translations in .zip files.

Using zip files reduce the file count in installer.
Uncompressed zip files can be compressed better by
packaging, thus we reduce the size of final package.

Change-Id: Id7c5ee9e302de325a29702b4e64301dc7102b2cf
Reviewed-on: https://gerrit.libreoffice.org/6938
Reviewed-by: Andras Timar <andras.timar@collabora.com>
Tested-by: Andras Timar <andras.timar@collabora.com>