gnu: unzip: Add various fixes.

gnu: unzip: Add various fixes.

* gnu/packages/patches/unzip-increase-size-of-cfactorstr.patch: Delete
  file.  Replace with ...
* gnu/packages/patches/unzip-overflow-long-fsize.patch: ... this new file.
* gnu/packages/patches/unzip-attribs-overflow.patch,
  gnu/packages/patches/unzip-fix-overflows-and-infloop.patch,
  gnu/packages/patches/unzip-format-secure.patch: New files.
* gnu/packages/patches/unzip-CVE-2014-9636.patch: Replace contents with
  fixed patch from Fedora.
* gnu-system.am (dist_patch_DATA): Adjust accordingly.
* gnu/packages/zip.scm (unzip)[source]: Adjust list of patches.