gnulib-tool: new option --gnu-make This is for applications like GNU Emacs that use GNU Make features instead of Automake. * doc/gnulib-tool.texi (Initial import): Mention --gnu-make. * doc/gnulib.texi (Unit test modules, Build robot for gnulib): Do not assume Automake. * gnulib-tool (func_determine_path_separator) (func_modules_transitive_closure, func_update_file) (func_emit_lib_Makefile_am, func_emit_tests_Makefile_am) (func_import): Add support for --gnu-make.