gnulib-tool.py: Follow gnulib-tool changes, part 23.
Follow gnulib-tool changes
2016-11-11 Bruno Haible <bruno@clisp.org>
gnulib-tool: Support for the dual "LGPLv3+ or GPLv2" license.
2016-12-02 Nikos Mavrogiannopoulos <nmav@gnutls.org>
gnulib-tool (func_import): Adhere to the license guideline ...
2016-12-02 Daiki Ueno <ueno@gnu.org>
gnulib-tool (func_import): Relax the regex ...
* gnulib-tool.py: For --lgpl, accept value 3orGPLv2.
* pygnulib/GLInfo.py (GLInfo.usage): Update.
* pygnulib/GLConfig.py (GLConfig.setLGPL): Update argument check.
* pygnulib/GLImport.py (GLImport.__init__, GLImport.gnulib_cache):
Update gl_LGPL handling.
(GLImport.prepare): Update license compatibility checks and license
header rewriting.
* pygnulib/GLTestDir.py (GLTestDir.execute): Update license
compatibility checks. Handle also the licenses GPLv3+, GPL, LGPLv3+.