[calls] ci: Grab submodules by setting GIT_SUBMODULE_STRATEGY

[Evangelos Ribeiro Tzaras <devrtz src gnome org>]

commit 2ce0c7775c36b2180e262974436efd4ff63109e6
Author: Evangelos Ribeiro Tzaras <devrtz fortysixandtwo eu>
Date:   Fri Oct 1 18:34:51 2021 +0200

    ci: Grab submodules by setting GIT_SUBMODULE_STRATEGY

 .gitlab-ci.yml | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 19d2545a..f5919fc6 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -9,6 +9,7 @@ stages:
 
 variables:
   L5_DOCKER_IMAGE: debian:bookworm
+  GIT_SUBMODULE_STRATEGY: normal
 
 build:native:
   stage: build