[evince/wip/gpoo/gitlab-ci] gitlab-ci: Install libsynctex in Docker image

[Germán Poo-Caamaño <gpoo src gnome org>]

commit 469e2672ee8e0f1dbd26b1e0ae201537f9277c65
Author: Germán Poo-Caamaño <gpoo gnome org>
Date:   Fri Jun 25 22:57:49 2021 -0400

    gitlab-ci: Install libsynctex in Docker image
    
    It will help choose whether to use the internal synctex
    library or the one in the system. Currently, it is chosen
    automatically.

 .gitlab-ci/setup-ubuntu.sh | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/.gitlab-ci/setup-ubuntu.sh b/.gitlab-ci/setup-ubuntu.sh
index 3271b3d0..06ec53e3 100644
--- a/.gitlab-ci/setup-ubuntu.sh
+++ b/.gitlab-ci/setup-ubuntu.sh
@@ -16,6 +16,7 @@ apt-get -yq install gnome-common libglib2.0-dev-bin \
                                        libpoppler-glib-dev poppler-data \
                                        libspectre-dev libtiff5-dev libdjvulibre-dev \
                                        libkpathsea-dev libarchive-dev libgxps-dev \
+                                       libsynctex-dev \
                                        ccache systemd ninja-build python3-pip
 apt-get clean
 rm -rf /var/lib/apt/lists/*