[gnome-build-meta/tristan/pipeline-enhancements] Ensure log dir

[Tristan Van Berkom <tvb src gnome org>]

commit 1c5919bda1e879ae74fd415a0bbd73a5246c4f9d
Author: Tristan Van Berkom <tristan vanberkom codethink co uk>
Date:   Thu Apr 26 20:50:36 2018 +0900

    Ensure log dir

 .gitlab-ci.yml | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 8e9daa9..69184d6 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -30,6 +30,9 @@ before_script:
   - git -C buildstream/ checkout $BST_SHA
   - pip3 install buildstream/
 
+  # Ensure the log directory exists
+  - mkdir -p ${BST_LOGS}
+
   # Generate a build.conf which configures the build
   - |
     cat > ${CI_PROJECT_DIR}/build.conf << EOF