Updated nginx.

library/nginx

@@ -1,6 +1,6 @@
 # maintainer: NGINX Docker Maintainers <[email protected]> (@nginxinc)
 
-latest: git://github.com/nginxinc/docker-nginx@3713a0157083eb4776e71f5a5aef4b2a5bc03ab1
-1: git://github.com/nginxinc/docker-nginx@3713a0157083eb4776e71f5a5aef4b2a5bc03ab1
-1.7: git://github.com/nginxinc/docker-nginx@3713a0157083eb4776e71f5a5aef4b2a5bc03ab1
-1.7.5: git://github.com/nginxinc/docker-nginx@3713a0157083eb4776e71f5a5aef4b2a5bc03ab1
+latest: git://github.com/nginxinc/docker-nginx@64ce8e442caea8b78ff5ebc144a527fc3f6d6d8b
+1: git://github.com/nginxinc/docker-nginx@64ce8e442caea8b78ff5ebc144a527fc3f6d6d8b
+1.7: git://github.com/nginxinc/docker-nginx@64ce8e442caea8b78ff5ebc144a527fc3f6d6d8b
+1.7.6: git://github.com/nginxinc/docker-nginx@64ce8e442caea8b78ff5ebc144a527fc3f6d6d8b