[gimp] Issue #5109: "gimp-win64" CI artifact is missing gegl:npd support.

[Jehan <jehanp src gnome org>]

commit 95fa7bc68c4d8aa176fa82c7f284cf1fb3e4ed41
Author: Jehan <jehan girinstud io>
Date:   Thu May 21 11:32:39 2020 +0200

    Issue #5109: "gimp-win64" CI artifact is missing gegl:npd support.
    
    Cairo is a dependency for "gegl:npd" required by GIMP, so let's install
    it before compiling GEGL.

 build/windows/crossbuild-gitlab-ci/build-deps.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/build/windows/crossbuild-gitlab-ci/build-deps.sh 
b/build/windows/crossbuild-gitlab-ci/build-deps.sh
index e553d43e6a..f9d6fc2539 100644
--- a/build/windows/crossbuild-gitlab-ci/build-deps.sh
+++ b/build/windows/crossbuild-gitlab-ci/build-deps.sh
@@ -11,7 +11,7 @@ cd ..
 
 # GEGL
 
-crossroad install json-glib && \
+crossroad install cairo json-glib && \
 git clone --depth 1 https://gitlab.gnome.org/GNOME/gegl.git && cd gegl && \
 crossroad meson _build/ -Dintrospection=false -Dsdl2=disabled -Dlibdir=lib && \
 ninja -C _build install || exit 1