Adds basic support for optionally outputting in the XML format
commonly used by JUnit compatible tools.
This format is supported by default by many tools, including
the Jenkins build system. It also is more detailed and
captures more information than the more simplistic TAP
format.
Signed-off-by: Jon A. Cruz <jonc@osg.samsung.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>