Updated mainline nginx to 1.11.13.

library/nginx

@@ -3,12 +3,12 @@
 Maintainers: NGINX Docker Maintainers <[email protected]> (@nginxinc)
 GitRepo: https://github.com/nginxinc/docker-nginx.git
 
-Tags: 1.11.12, mainline, 1, 1.11, latest
-GitCommit: 29b52049eba48ce0eaef84696149b9b16160e900
+Tags: 1.11.13, mainline, 1, 1.11, latest
+GitCommit: 0c7611139f2ce7c5a6b1febbfd5b436c8c7d2d53
 Directory: mainline/jessie
 
-Tags: 1.11.12-alpine, mainline-alpine, 1-alpine, 1.11-alpine, alpine
-GitCommit: 29b52049eba48ce0eaef84696149b9b16160e900
+Tags: 1.11.13-alpine, mainline-alpine, 1-alpine, 1.11-alpine, alpine
+GitCommit: 0c7611139f2ce7c5a6b1febbfd5b436c8c7d2d53
 Directory: mainline/alpine
 
 Tags: 1.10.3, stable, 1.10