[gnome-online-accounts] add frontend-only build to CI

[Emmanuele Bassi <ebassi src gnome org>]

commit f81441b761aa0457a5ab337d20ec857234b6466b
Author: Paolo Bonzini <pbonzini redhat com>
Date:   Thu May 19 19:11:54 2022 +0200

    add frontend-only build to CI

 .gitlab-ci.yml | 13 +++++++++++++
 1 file changed, 13 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index eec22f4a..e194baa5 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -14,3 +14,16 @@ build-meson:
     - meson setup -Dgtk_doc=true _build
     - meson compile -C _build
     - meson test -C _build
+
+build-meson-nobackend:
+  image: fedora:latest
+  stage: build
+  before_script:
+    - dnf update -y
+    - dnf -y install
+      meson gcc dbus-devel glib2-devel gobject-introspection-devel
+      gtk3-devel rest-devel vala
+  script:
+    - meson setup -Dgtk_doc=false -Dgoabackend=false _build
+    - meson compile -C _build
+    - meson test -C _build