yoda: Cleanup long options array code generator

Signed-off-by: Pavel Emelyanov <xemul@sacred.ru>
yoda: Report to the caller the CLI tail

These are options left unparsed after all options/args parse.
The index of the very first of them is stored in yopt_tail.

Signed-off-by: Pavel Emelyanov <xemul@sacred.ru>