util: Add sudoers.d/ example directory

Change-Id: Ib9ab4d88bf2fb94d04240169e0203b72616f58b0
diff --git a/utils/sudoers.d/osmo-gsm-tester_setcap_net_admin b/utils/sudoers.d/osmo-gsm-tester_setcap_net_admin
new file mode 100644
index 0000000..5412bdd
--- /dev/null
+++ b/utils/sudoers.d/osmo-gsm-tester_setcap_net_admin
@@ -0,0 +1 @@
+%osmo-gsm-tester ALL=(root) NOPASSWD: /usr/local/bin/osmo-gsm-tester_setcap_net_admin.sh