gnulib-tool.py: Follow gnulib-tool changes, part 59. Follow gnulib-tool change 2017-10-29 Bruno Haible <bruno@clisp.org> gnulib-tool: Avoid unnecessary config.h.in remaking in testdirs. * pygnulib/GLTestDir.py (GLTestDir.execute): Touch the 'config.h.in' file after executing 'autoheader' to update it's timestamps.