CI/msys2: disable coverage reporting, lcov doesn't support gcc9 yet

(Backport: Fix minor cherry-pick conflicts.)

linux-test-project/lcov#58

Fixes: #1795

.gitlab-ci/test-msys2.sh

@@ -42,20 +42,23 @@ meson --werror --buildtype debug _build
 cd _build
 ninja
 
-"${LCOV}" \
-    --quiet \
-    --config-file "${DIR}"/.gitlab-ci/lcovrc \
-    --directory "${DIR}/_build" \
-    --capture \
-    --initial \
-    --output-file "${DIR}/_coverage/${CI_JOB_NAME}-baseline.lcov"
+# FIXME: lcov doesn't support gcc9 yet:
+# https://github.com/linux-test-project/lcov/issues/58
+#"${LCOV}" \
+#    --quiet \
+#    --config-file "${DIR}"/.gitlab-ci/lcovrc \
+#    --directory "${DIR}/_build" \
+#    --capture \
+#    --initial \
+#    --output-file "${DIR}/_coverage/${CI_JOB_NAME}-baseline.lcov"
 
 # FIXME: fix the test suite
 meson test --timeout-multiplier ${MESON_TEST_TIMEOUT_MULTIPLIER} --no-suite flaky || true
 
-"${LCOV}" \
-    --quiet \
-    --config-file "${DIR}"/.gitlab-ci/lcovrc \
-    --directory "${DIR}/_build" \
-    --capture \
-    --output-file "${DIR}/_coverage/${CI_JOB_NAME}.lcov"
+# FIXME: see above
+#"${LCOV}" \
+#    --quiet \
+#    --config-file "${DIR}"/.gitlab-ci/lcovrc \
+#    --directory "${DIR}/_build" \
+#    --capture \
+#    --output-file "${DIR}/_coverage/${CI_JOB_NAME}.lcov"