Add ldconfig in ns3 role

Author: pichuang

ansible/roles/ns3/tasks/main.yml

@@ -53,6 +53,9 @@
   args:
     chdir: "{{ home_location }}/ns-allinone-{{ NS3_VERSION }}/ns-{{ NS3_VERSION }}"
   tags: ns3
+- name: Configure dynamic linker run-time bindings
+  command: "ldconfig"
+  tags: ns3
 - name: Create Waf Shell
   template:
     src: "waf_shell.sh.j2"