libpng16-1.6.44-160000.2.2

- version update to 1.6.44:
  * Hardened calculations in chroma handling to prevent overflows, and
    relaxed a constraint in cHRM validation to accomodate the standard
    ACES AP1 set of color primaries.
    (Contributed by John Bowler)
  * Removed the ASM implementation of ARM Neon optimizations and updated
    the build accordingly. Only the remaining C implementation shall be
    used from now on, thus ensuring the support of the PAC/BTI security
    features on ARM64.
    (Contributed by Ross Burton and John Bowler)
  * Fixed the pickup of the PNG_HARDWARE_OPTIMIZATIONS option in the
    CMake build on FreeBSD/amd64. This is an important performance fix
    on this platform.
  * Applied various fixes and improvements to the CMake build.
    (Contributed by Eric Riff, Benjamin Buch and Erik Scholz)
  * Added fuzzing targets for the simplified read API.
    (Contributed by Mikhail Khachayants)
  * Fixed a build error involving pngtest.c under a custom config.
    This was a regression introduced in a code cleanup in libpng-1.6.43.
    (Contributed by Ben Wagner)
  * Fixed and improved the config files for AppVeyor CI and Travis CI.
- Drop upstream patch:
  * 563.patch

- Fix missing backslash

- Backport patch to fix PAC/BTI support on aarch64:
  * 563.patch

- version update to 1.6.43
  * Fixed the row width check in png_check_IHDR().
    This corrected a bug that was specific to the 16-bit platforms,
    and removed a spurious compiler warning from the 64-bit builds.
    (Reported by Jacek Caban; fixed by John Bowler)
  * Added eXIf chunk support to the push-mode reader in pngpread.c.
    (Contributed by Chris Blume)
  * Added contrib/pngexif for the benefit of the users who would like
    to inspect the content of eXIf chunks.
  * Added contrib/conftest/basic.dfa, a basic build-time configuration.
    (Contributed by John Bowler)
  * Fixed a preprocessor condition in pngread.c that broke build-time
    configurations like contrib/conftest/pngcp.dfa.
    (Contributed by John Bowler)
  * Added CMake build support for LoongArch LSX.
    (Contributed by GuXiWei)
  * Fixed a CMake build error that occurred under a peculiar state of the
    dependency tree. This was a regression introduced in libpng-1.6.41.
    (Contributed by Dan Rosser)
  * Marked the installed libpng headers as system headers in CMake.
    (Contributed by Benjamin Buch)
  * Updated the build support for RISCOS.
    (Contributed by Cameron Cawley)
  * Updated the makefiles to allow cross-platform builds to initialize
    conventional make variables like AR and ARFLAGS.
  * Added various improvements to the CI scripts in areas like version
    consistency verification and text linting.
  * Added version consistency verification to pngtest.c also.

- Update to version 1.6.42:
  * Fixed the implementation of the macro function "png_check_sig".
  This was an API regression, introduced in libpng-1.6.41.
  (Reported by Matthieu Darbois)

- Update to version 1.6.40:
  * Fixed the eXIf chunk multiplicity checks.
  * Fixed a memory leak in pCAL processing.
  * Corrected the validity report about tRNS inside png_get_valid().
  * Fixed various build issues on *BSD, Mac and Windows.
  * Updated the configurations and the scripts for continuous integration.
  * Cleaned up the code, the build scripts, and the documentation.

- do not use NEON instructions [bsc#1211176]

- Fix license tag to libpng-2.0.

- Fix build: some*.la files are symlinks. Adjust spec to use
  find -type f,l

- switch to pkgconfig(zlib) to allow alternative providers as well
- build with glibc hwcaps optimized libs