[make init] update submodule's remotes (sonic-net#5534)

* [make reset] update submodule's remotes

This change is to address an issue where when using a long standing repo to build image, the submodule could become out-dated with their remotes so that make init is no longer to bring all submoudles to the latest. The consequence is weird build failures.

When we update/switch branch in a long standing repo, we will issue 'make reset' to get repo ready for next build. Updating all submodule's remotes during "make reset" address the issue.

Signed-off-by: Ying Xie <ying.xie@microsoft.com>

Makefile.work

@@ -301,6 +301,7 @@ reset :
 	        git reset --hard;
 	        git submodule foreach --recursive 'git clean -xfdf || true';
 	        git submodule foreach --recursive 'git reset --hard || true';
+	        git submodule foreach --recursive 'git remote update || true';
 	        git submodule update --init --recursive;
 	        echo "Reset complete!";
 	    else