ci: add html report to hafnium code coverage

It requires to archive any subfolder containing
'qa-code-coverage' and file 'report.html'. Removing some output
from wget and tar.

Signed-off-by: Saul Romero <saul.romero@arm.com>
Change-Id: I5316d18f640b8f57e59e593bad47f9e67216dca0
1 file changed