gitignore: Ignore html manpage

Ignore waffle_feature_test_macros.7.html.

Signed-off-by: Chad Versace <chad.versace@linux.intel.com>
wflinfo: add --help parameter

--help will cause wflinfo to print usage information to
stdout and exit with a return code of 0.

Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Signed-off-by: Chad Versace <chad.versace@linux.intel.com>