[geary/cherry-pick-423a55b0] .gitlab-ci.yml: Add test deps so that certtool is installed

[Michael Gratton <mjog src gnome org>]

commit 1875c1fc6fb2e1cd8a1820e0220bb60629137bf8
Author: Michael Gratton <mike vee net>
Date:   Tue Aug 25 16:40:16 2020 +1000

    .gitlab-ci.yml: Add test deps so that certtool is installed

 .gitlab-ci.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 37c402092..ef20ae300 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -29,7 +29,7 @@ variables:
     libappstream-glib-devel libgee-devel libhandy-devel libpeas-devel
     libsecret-devel libunwind-devel libxml2-devel libytnef-devel
     sqlite-devel webkitgtk4-devel
-  FEDORA_TEST_DEPS: glibc-langpack-en tar xz Xvfb
+  FEDORA_TEST_DEPS: glibc-langpack-en gnutls-utils tar Xvfb xz
 
   # Ubuntu packages
   UBUNTU_DEPS:
@@ -40,7 +40,7 @@ variables:
     libjson-glib-dev libmessaging-menu-dev libpeas-dev libsecret-1-dev
     libsqlite3-dev libunwind-dev libwebkit2gtk-4.0-dev libxml2-dev
     libytnef0-dev
-  UBUNTU_TEST_DEPS: locales xauth xvfb
+  UBUNTU_TEST_DEPS: gnutls-bin locales xauth xvfb
 
 fedora:
   stage: build