tools: add skeleton of kmod tool

If using libtool 2.4.2, running the script generated by libtool will not
work because libtool changes argv[0] to lt-progname.

To test this is necessary to either fix the installed
build-aux/ltmain.sh file or run the binary directly like in:

$ export LD_LIBRARY_PATH=$PWD/libkmod/.libs/
$ ./tools/.libs/kmod help
diff --git a/tools/kmod.h b/tools/kmod.h
new file mode 100644
index 0000000..27cb71a
--- /dev/null
+++ b/tools/kmod.h
@@ -0,0 +1,30 @@
+/*
+ * kmod - one tool to rule them all
+ *
+ * Copyright (C) 2011  ProFUSION embedded systems
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KMOD_H_
+
+#include "macro.h"
+
+struct kmod_cmd {
+	const char *name;
+	int (*cmd)(int argc, char *argv[]);
+	const char *help;
+};
+
+#endif