Add COV=1 and the `coverage-report` target to unit test build rules
in `what-jenkins-does` so that we get code coverage data from the
coreboot and libpayload unit tests.
Signed-off-by: Paul Fagerburg <pfagerburg@google.com>
Change-Id: I96669c47d1a48e9ab678a4b9cb1d0c8032d727f0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58634
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>