texinfo-dummy-native: Rewrite template.py to use argparse
The original version of template.py parses the arguments manually. This
fails when looking for the -E option if, e.g., an -I option is specified
without any space before its argument, and that argument contains the
letter 'E'.
A minor difference to the original version is that it parsed the
arguments in the order they were specified on the command line whereas
this version will always handle -E before -o.
Signed-off-by: Peter Kjellerstedt <peter.kjellerstedt@axis.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
