update the version of git used on corddev

Change-Id: I99d9613ea9cb40c4e78475c0f6286a4cfda46203
diff --git a/ansible/roles/buildtools/tasks/main.yml b/ansible/roles/buildtools/tasks/main.yml
index 6c0e3faf..87bd6c0 100644
--- a/ansible/roles/buildtools/tasks/main.yml
+++ b/ansible/roles/buildtools/tasks/main.yml
@@ -1,3 +1,9 @@
+- name: Apt Repo
+  apt_repository:
+    repo: ppa:git-core/ppa
+    state: present
+    update_cache: yes
+
 - name: Apt packages
   apt:
     name: "{{ item }}"