fix check-generate script

Author: Gardener

hack/check-generate.sh

@@ -68,7 +68,7 @@ if which git &>/dev/null; then
 
   old_status="$(git status -s)"
 
-  if ! out=$(rm -rf hack/tools/bin/ 2>&1); then
+  if ! out=$(rm -rf hack/tools/bin/* 2>&1); then
     echo "Error while cleaning hack/tools/bin/: $out"
     exit 1
   fi
@@ -81,6 +81,8 @@ if which git &>/dev/null; then
   fi
   new_status="$(git status -s)"
 
+  git diff
+
   if [[ "$old_status" != "$new_status" ]]; then
     echo "make generate needs to be run:"
     echo "$new_status"