[libsecret] gitlab-ci: Work around lcov incompatibility with gcc-9

[Daiki Ueno <dueno src gnome org>]

commit 5f5e560f0b2fdcded94b3f5da7bce0447e171c12
Author: Daiki Ueno <dueno src gnome org>
Date:   Sun Jun 9 08:27:03 2019 +0200

    gitlab-ci: Work around lcov incompatibility with gcc-9

 .gitlab-ci.yml | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 4638e30..23dc653 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -66,6 +66,8 @@ fedora:coverage:
     name: "libsecret-${CI_JOB_NAME}-${CI_COMMIT_REF_NAME}"
     paths:
       - _build/meson-logs/coveragereport/
+  # https://github.com/linux-test-project/lcov/issues/58
+  allow_failure: true
 
 pages:
   stage: deploy