- Remove %_smp_build_ncpus in meson-suse-ify-macros.patch.
- Drop broken meson-restore-python3.4.patch,
meson-suse-fix-llvm-3.8.patch, meson-fix-gcc48.patch.

- Add meson-pr7461-remove-setuptools-dependency.patch: Fixes forced
requirement on setuptools (gh#mesonbuild/meson#7461).

- Update to version 0.55.0
+ rpath removal now more careful
+ Added ability to specify targets in `meson compile`
+ Added test protocol for gtest
+ meson.add_*_script methods accept new types
+ Native and cross files now support string and list concatenation
+ Ability to configure CMake subprojects with meson.subproject_options
+ find_program: Fixes when the program has been overridden by executable
+ Response files enabled on Linux
+ `unstable-kconfig` module renamed to `unstable-keyval`
+ Config tool based dependencies no longer search PATH for cross compiling
+ String concatenation in meson_options.txt
+ Clang coverage support
+ Implicit dependency fallback
+ Added ability to specify backend arguments in `meson compile`
- Removed meson-fix-gnome-test.patch: contained in upstream
- Changed meson-suse-ify-macros.patch: to be compatible with new
version