Sending report email was not working correctly if the script was given
an html report path that contained directory components.
(From OE-Core rev: 1da641661bb5963fcbd7ac2c20bc997c3eae6f18)
Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>