Make the tracking log dir and file.

Syslog creates it lazily which causes s3 log syncing to break if this doesn't already exist.

playbooks/roles/edxapp/tasks/main.yml

@@ -61,6 +61,27 @@
     - install
     - install:base
 
+- name: Ensure the tracking folder exists
+  file:
+    path: "{{ COMMON_LOG_DIR }}/tracking"
+    state: directory
+    owner: root
+    group: root
+  tags:
+    - install
+    - install:base
+
+- name: Ensure the tracking.log file exists
+  file:
+    path: "{{ COMMON_LOG_DIR }}/tracking/tracking.log"
+    state: touch
+    owner: syslog
+    group: adm
+    mode: "0640"
+  tags:
+    - install
+    - install:base
+
 - name: create web-writable edxapp data dirs
   file:
     path: "{{ item }}"