[gtk/revert-82ab039a] ci: Add debug spew on macos

[Matthias Clasen <matthiasc src gnome org>]

commit b1c1e02c288e94b889b1709131d8be26dd40e030
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Feb 12 15:24:27 2021 -0500

    ci: Add debug spew on macos

 .gitlab-ci.yml | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index edde8904aa..300cb865a1 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -159,6 +159,7 @@ macos:
     - pip3 install --user meson==0.56
     - pip3 install --user ninja
     - export PATH=/Users/gitlabrunner/Library/Python/3.7/bin:$PATH
+    - export MESON_FORCE_BACKTRACE=1
   script:
     - meson -Dx11-backend=false
             -Dintrospection=disabled