cq: Save the html report for herobrine coverage
cq: Save the html report for herobrine coverage

In addition to the all boards html coverage report, also include the
herobrine html in the build artifacts.

BRANCH=None
BUG=None
TEST=Did build, looked in artifacts dir

Signed-off-by: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@google.com>
Change-Id: Ida81797963cb1db700f7de5b4fb43acdcca490a4
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3854555
Reviewed-by: Yuval Peress <50dc11c009bd4d7e9d9d15a383c1743ce5ee82ef@google.com>
Auto-Submit: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@chromium.org>
Commit-Queue: Yuval Peress <50dc11c009bd4d7e9d9d15a383c1743ce5ee82ef@google.com>
Tested-by: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec