tf-a-builder.yaml: archive code coverage trace reports

Archive code coverage trace reports so the job artefacts would contain
the generated report.

Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
Change-Id: Ie932ad3a4ef0740671d43b7dbba2636d2b9928de
diff --git a/tf-a-builder.yaml b/tf-a-builder.yaml
index e334896..6753f4e 100644
--- a/tf-a-builder.yaml
+++ b/tf-a-builder.yaml
@@ -220,7 +220,7 @@
             condition-basedir: workspace
             action:
                 - archive:
-                    artifacts: lava.log, lava-uart?.log
+                    artifacts: lava.log, lava-uart?.log, feedback.log, config_file.json, covtrace-*.log, trace_report/**
                     latest-only: false
                     allow-empty: true
         - groovy-postbuild: