[FFe] upgrade libzip to version 1.5.0

Feature Freeze Justification
============================
This release fixes to two CVE's and most notably has removed its custom AES crypto implementation with using openssl libraries. It is for the security reasons I am requesting this FFe this late in the cycle.

Other Changes:
- A bunch of bug fixes
- A number of new features like bzip2 (this optional and could be disabled for 18.04), improved AES encryption support, some of the new features are other platforms only
- Breaks API (only 1 symbol was removed though), soname bump, so will require a mini transition, all the 24 reverse-depends that I count are in universe. Some are seeded in flavours (see below)
- Build system switched to Cmake in latest release
- Ark will build with libzip support where it didnt before

Testing:
It has a fairly comprehensive test suite, all tests are now passing.

I have run a test rebuild for all the rdepends in ppa:darkxst/libzip. All built successfully, except for 2 packages, cbmc and plume-creater that had unrelated fallout due to gcc7 and other packaging changes (fixed on PPA).

Other Notes:
- Various fixes (rpath, man page syntax, leaky private symbols and pkg-config fixes) have been committed upstream and will be released soon in a 1.5.1 release, cherry-picked patches for now
- I will also push for the update into Debian

Build Logs:
https://launchpadlibrarian.net/363623662/buildlog_ubuntu-bionic-amd64.libzip_1.5.0-0ubuntu1~bionic6_BUILDING.txt.gz

Reverse-depends of libzip4 that are seeded:
ark (from ark) is seeded in:
  kubuntu: daily-live
  lubuntu-next: daily-live
ideviceinstaller is seeded in:
  ubuntu-mate: daily-live
libepub0 is seeded in:
  kubuntu: daily-live
  ubuntustudio: dvd
libpstoedit0c2a is seeded in:
  kubuntu: supported
okular-extra-backends is seeded in:
  kubuntu: daily-live

Upstream Changelog
==================
1.5.0 [2018-03-11]
==================

* Use standard cryptographic library instead of custom AES implementation.
  This also simplifies the license.
* Use `clang-format` to format the source code.
* More Windows improvements.

1.4.0 [2017-12-29]
==================

* Improve build with cmake
* Retire autoconf/automake build system
* Add `zip_source_buffer_fragment()`.
* Add support to clone unchanged beginning of archive (instead of rewriting it).
  Supported for buffer sources and on Apple File System.
* Add support for Microsoft Universal Windows Platform.

1.3.2 [2017-11-20]
==================
* Fix bug introduced in last: zip_t was erroneously freed if zip_close() failed.

1.3.1 [2017-11-19]
==================

* Install zipconf.h into ${PREFIX}/include
* Add zip_libzip_version()
* Fix AES tests on Linux

1.3.0 [2017-09-02]
==================

* Support bzip2 compressed zip archives
* Improve file progress callback code
* Fix zip_fdopen()
* CVE-2017-12858: Fix double free()
* CVE-2017-14107: Improve EOCD64 parsing

1.2.0 [2017-02-19]
==================

* Support for AES encryption (Winzip version), both encryption
  and decryption
* Support legacy zip files with >64k entries
* Fix seeking in zip_source_file if start > 0
* Add zip_fseek() for seeking in uncompressed data
* Add zip_ftell() for telling position in uncompressed data
* Add zip_register_progress_callback() for UI updates during zip_close()

1.1.3 [2016-05-28]
==================

* Fix build on Windows when using autoconf