- add no-legacyversion-warning.patch to restore compatibility with 20.4

OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-packaging?expand=0&rev=48

python-packaging.spec

@@ -1,5 +1,5 @@
 #
-# spec file for package python-packaging
+# spec file for package python-packaging-test
 #
 # Copyright (c) 2021 SUSE LLC
 #
@@ -32,6 +32,8 @@ Summary:        Core utilities for Python packages
 License:        Apache-2.0
 URL:            https://github.com/pypa/packaging
 Source:         https://files.pythonhosted.org/packages/source/p/packaging/packaging-%{version}.tar.gz
+# Restore compatibility with 20.4 for setuptools
+Patch1:         no-legacyversion-warning.patch
 BuildRequires:  %{python_module six}
 BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros
@@ -55,6 +57,7 @@ Core utilities for Python packages
 
 %prep
 %setup -q -n packaging-%{version}
+%patch1 -p1
 # sdist must provide a packaging.egg-info, used below in install phase
 test -d packaging.egg-info