[tracker-miners] ci: Show which commit of tracker.git was used in the CI build

[Sam Thursfield <sthursfield src gnome org>]

commit 88b6a93295dad17bfda9368ff65eafcf8a663838
Author: Sam Thursfield <sam afuera me uk>
Date:   Mon Jul 6 12:24:08 2020 +0200

    ci: Show which commit of tracker.git was used in the CI build

 .gitlab-ci.yml | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 33ac0627d..349060c88 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -23,6 +23,7 @@ stages:
     # We can build and test tracker-miners against tracker just by building
     # tracker as a submodule.
     - su tracker -c '.gitlab-ci/checkout-tracker.sh'
+    - echo "Building tracker.git commit $(git rev-parse HEAD)"
     - su tracker -c 'mkdir build'
     - su tracker -c 'cd build; meson .. --prefix=/usr -Dtracker_core=subproject -Db_lto=true 
-Db_coverage=true'
     - su tracker -c 'cd build; ninja'