[gimp/wip/Jehan/testing-msys2-win-CI] Test update before install.

[Jehan <jehanp src gnome org>]

commit d4185c18f18aaa4fa2b5657f755bb6a7cf720d41
Author: Jehan <jehan girinstud io>
Date:   Thu Apr 16 15:59:33 2020 +0200

    Test update before install.

 build/windows/crossbuild-gitlab-ci/build-deps.sh | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/build/windows/crossbuild-gitlab-ci/build-deps.sh 
b/build/windows/crossbuild-gitlab-ci/build-deps.sh
index 88da893897..025975cf2f 100644
--- a/build/windows/crossbuild-gitlab-ci/build-deps.sh
+++ b/build/windows/crossbuild-gitlab-ci/build-deps.sh
@@ -19,6 +19,7 @@ cd ..
 
 # preparing GIMP
 
+crossroad update
 crossroad install gexiv2 appstream-glib json-c \
                   libmypaint mypaint-brushes   \
                   poppler-data poppler glib2   \