gnulib-tool.py: Follow gnulib-tool changes, part 30. Follow gnulib-tool change 2021-05-30 Bruno Haible <bruno@clisp.org> Write 'LGPLv3+ or GPLv2+' instead of 'LGPLv3+ or GPLv2'. * pygnulib/GLImport.py (GLImport.prepare): Change. * pygnulib/GLTestDir.py (GLTestDir.execute): Likewise.