Fix hash path

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>

ci/gitlab-ci.yml

@@ -31,7 +31,7 @@ build:
     - ninja
     - DESTDIR=${CI_PROJECT_DIR}/artifacts ninja install
     - tar --directory ${CI_PROJECT_DIR}/artifacts -cvf ${CI_PROJECT_DIR}/mesa.tar.gz .
-    - md5sum --tag ${CI_PROJECT_DIR}/mesa.tar.gz > ${CI_PROJECT_DIR}/mesa.tar.gz.hash
+    - (cd ${CI_PROJECT_DIR} && md5sum --tag mesa.tar.gz > mesa.tar.gz.hash)
   artifacts:
     name: "$CI_JOB_NAME"
     paths: