CharLS-2.0.0-bp150.2.5

- Build with gcc6, fix build failure for Leap

- Fix RPM group.

- Update to version 2.0.0:
  Bug fixes
  * #10 - Fixed the problem that "output buffer to small" was not
    detected when writting encoded bytes to a fixed output buffer.
    This could cause memory corruption problems.
  * #11 - Update charlstest to return EXIT_SUCCESS/FAILURE
  * Fixed the issue that DecodeToPnm would set
    params.colorTransform = ColorTransformation::BigEndian but the
    library didn’t support this option during decoding.
  Misc
  * Updated the source code to C++ v14.
  * Refactored several API's to make usage of the library easier.
- Removed unzip build requirement (not needed anymore).
- Require gcc >= 5.0 (for C++ v14).
- Removed the following patches (not needed anymore):
  charls_add_cmake_install_target.patch
  charls_add_sharedlib_soname.patch
  charls_fix_tests.patch

- Fix the SLES build (%make_install is not expanded)

- license update: BSD-3-Clause
  The License file is BSD-3-Clause. Also, use SPDX format

- Initial release (version 1.0).
- Added three patches (taken from Fedora):
  * charls_add_cmake_install_target.patch: Add a cmake install target for
    CharLS header files.
  * charls_add_sharedlib_soname.patch: Add soname to generated shared lib and
    install libCharLS.so.
  * charls_fix_tests.patch: Fix tests.