azure/gitLab/travis: Add pygit2 as a dependency for tests

This lets patman run all of its tests, rather than skipping quite a few.

Signed-off-by: Simon Glass <sjg@chromium.org>

.gitlab-ci.yml

@@ -161,7 +161,7 @@ Run binman, buildman, dtoc, Kconfig and patman testsuites:
       export USER=gitlab;
       virtualenv -p /usr/bin/python3 /tmp/venv;
       . /tmp/venv/bin/activate;
-      pip install pyelftools pytest;
+      pip install pyelftools pytest pygit2;
       export UBOOT_TRAVIS_BUILD_DIR=/tmp/sandbox_spl;
       export PYTHONPATH="${UBOOT_TRAVIS_BUILD_DIR}/scripts/dtc/pylibfdt";
       export PATH="${UBOOT_TRAVIS_BUILD_DIR}/scripts/dtc:${PATH}";