Various packages rebuilt for dependencies

[Yaakov Selkowitz]

The following packages have been uploaded to the Cygwin distribution:

* ebook-tools-0.2.2-2
* kchmviewer-7.7-2
* okular-17.12.3-2
* pstoedit-3.71-2

These packages have been rebuilt for libzip-1.5.1.

-- 
Yaakov