[tracker-miners/sam/tracker-miners-2.3-use-tracker-2.3] ci: Build tracker-miners-2.3 against tracker-2.3, not master

[Sam Thursfield <sthursfield src gnome org>]

commit 16cdb61b3badfa83c4c08273492fc183ff8a6204
Author: Sam Thursfield <sam afuera me uk>
Date:   Sat Sep 21 17:17:34 2019 +0200

    ci: Build tracker-miners-2.3 against tracker-2.3, not master
    
    The 'master' branch of tracker.git is now working towards Tracker 3.0.
    This branch should be tested against Tracker 2.x.

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index cc3321388..e3f851747 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -17,7 +17,7 @@ test-fedora-latest:
     # somewhere. It would be nice to improve the functional-tests so that they
     # will run without depending on any files outside of the build tree. Note
     # that Tracker is installed on the host here, thanks to `dnf builddep`.
-    - su tracker -c 'mkdir subprojects; cd subprojects; git clone https://gitlab.gnome.org/GNOME/tracker'
+    - su tracker -c 'mkdir subprojects; cd subprojects; git clone https://gitlab.gnome.org/GNOME/tracker -b 
tracker-2.3'
     - su tracker -c 'mkdir build'
     - su tracker -c 'cd build; meson .. --prefix=/usr -Dtracker_core=subproject -Db_lto=true'
     - su tracker -c 'cd build; ninja'