CI: Add test command to show ip settings before build

build-yocto.yml

 ---
 
+.networkdebug: &networkdebug
+  #
+  - |-
+    set -x
+    ip address show
+    ping  -4 -c 2 www.google.com
+    ping  -6 -c 2 www.google.com
+    ping  -4 -c 1 git.seco.com # does not reply but shows the ip
+    set +x
+
 .collect_srcrevs: &collect_srcrevs
   # write all package AUTOREVS to file
   - |-
@@ -87,6 +97,7 @@
     - !reference [.setup_ssh]
     - !reference [.repo_checkout]
   script:
+    - *networkdebug
     - *save_build_env
     - *build_script
     - *collect_srcrevs