tree-wide: Use correct SPDX license identifier

src/core/bpf/meson.build

@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: LGPL-2.1+
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 if conf.get('BPF_FRAMEWORK') != 1
         subdir_done()

src/ukify/test/test_ukify.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# SPDX-License-Identifier: LGPL-2.1+
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 # pylint: disable=missing-docstring,redefined-outer-name,invalid-name
 # pylint: disable=unused-import,import-outside-toplevel,useless-else-on-loop

src/ukify/ukify.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# SPDX-License-Identifier: LGPL-2.1+
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 # pylint: disable=missing-docstring,invalid-name,import-outside-toplevel
 # pylint: disable=consider-using-with,unspecified-encoding,line-too-long