Make it possible to provide (extra) command line arguments to the
oe-build-perf-test-email script via a new environment variable
OE_BUILD_PERF_REPORT_EMAIL_EXTRA_ARGS.
(From OE-Core rev: 9cdd4ea5e006fe326bdf39ea437b9ba61a66b778)
Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>