need to upgrade build machine to get latest git 2.11

Change-Id: Ia50c8ba50cb048ce3c0836f9dacd79a88b6416fe
diff --git a/ansible/roles/buildtools/tasks/main.yml b/ansible/roles/buildtools/tasks/main.yml
index 87bd6c0..1cca698 100644
--- a/ansible/roles/buildtools/tasks/main.yml
+++ b/ansible/roles/buildtools/tasks/main.yml
@@ -4,6 +4,10 @@
     state: present
     update_cache: yes
 
+- name: Upgrade Packages
+  apt:
+    upgrade: yes
+
 - name: Apt packages
   apt:
     name: "{{ item }}"