gitlab: integrate coverage report

This should hopefully give is nice coverage information about what our
tests (or at least the subset we are running) have hit. Ideally we
would want a way to trigger coverage on tests likely to be affected by
the current commit.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20221117172532.538149-12-alex.bennee@linaro.org>

.gitlab-ci.d/buildtest.yml

@@ -494,7 +494,17 @@ check-gprof-gcov:
     IMAGE: ubuntu2004
     MAKE_CHECK_ARGS: check
   after_script:
-    - ${CI_PROJECT_DIR}/scripts/ci/coverage-summary.sh
+    - cd build
+    - gcovr --xml-pretty --exclude-unreachable-branches --print-summary
+        -o coverage.xml --root ${CI_PROJECT_DIR} . *.p
+  coverage: /^\s*lines:\s*\d+.\d+\%/
+  artifacts:
+    name: ${CI_JOB_NAME}-${CI_COMMIT_REF_NAME}-${CI_COMMIT_SHA}
+    expire_in: 2 days
+    reports:
+      coverage_report:
+        coverage_format: cobertura
+        path: build/coverage.xml
 
 build-oss-fuzz:
   extends: .native_build_job_template