hack/module.sh: sort modules for deterministic runs

find(1) seems to look at directory entries in the order in which they exist
in the directory fs entry. Let's sort these so that we get the same results
regardless of the order of the directory entries.

Signed-off-by: Andrew Keesler <akeesler@vmware.com>

hack/module.sh

@@ -49,7 +49,7 @@ function with_modules() {
   cmd="$(${cmd_function})"
 
   pushd "${root_dir}"
-  for mod_file in $(find . -maxdepth 4 -name go.mod); do
+  for mod_file in $(find . -maxdepth 4 -name go.mod | sort); do
     mod_dir="$(dirname "${mod_file}")"
     (
       echo "=> " && \