roles/aurweb: Add the templates for apcu.ini php config and for cgit uwsgi

Added the templates for the apcu.ini configuration for php and for the uwsgi
config for cgit.

roles/aurweb/templates/apcu.ini.j2

+apc.shm_size={{ aurweb_apc_shm_size }}
+apc.ttl={{ aurweb_apc_ttl }}
+apc.entries_hint={{ aurweb_apc_entries_hint }}

roles/aurweb/templates/cgit.ini.j2

+[uwsgi]
+plugins = cgi
+socket = /run/uwsgi/cgit.sock
+chown-socket = http:http
+chmod-socket = 770
+threads = 4
+
+cgi = /usr/share/webapps/cgit-aurweb/cgit.cgi
+uid = {{ aurweb_user }}
+gid = {{ aurweb_user }}