[pygobject] gitlab-ci: Install pytest-faulthandler

[Christoph Reiter <creiter src gnome org>]

commit ad9fc2d9cd8d9a0f3fd07a46e7056a182f18d399
Author: Christoph Reiter <reiter christoph gmail com>
Date:   Wed Feb 14 01:29:09 2018 +0100

    gitlab-ci: Install pytest-faulthandler
    
    This makes pytest print a Python stack trace in case of a crash.

 .gitlab-ci/test-docker.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci/test-docker.sh b/.gitlab-ci/test-docker.sh
index 2ec40936..2daba871 100755
--- a/.gitlab-ci/test-docker.sh
+++ b/.gitlab-ci/test-docker.sh
@@ -5,7 +5,7 @@ set -e
 python --version
 
 python -m pip install git+https://github.com/pygobject/pycairo.git
-python -m pip install flake8 pytest
+python -m pip install flake8 pytest pytest-faulthandler
 
 PY_PREFIX="$(python -c 'import sys; sys.stdout.write(sys.prefix)')"
 export PKG_CONFIG_PATH="${PY_PREFIX}/lib/pkgconfig"