upgrade to zlib-1.2.8
upgrade to zlib-1.2.8

Change-Id: I67db2bfb386f1cc7ffeb92ec12a64e12e4552160
Reviewed-on: https://gerrit.libreoffice.org/9315
Tested-by: LibreOffice gerrit bot <3b97070d46ccd66422a8e7b83e6967ed84780538@libreoffice.org>
Reviewed-by: Thomas Arnhold <5f50a84c1fa3bcff146405017f36aec1a10a9e38@arnhold.org>

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core