Update mainline nginx to 1.11.9.

library/nginx

@@ -3,12 +3,12 @@
 Maintainers: NGINX Docker Maintainers <[email protected]> (@nginxinc)
 GitRepo: https://github.com/nginxinc/docker-nginx.git
 
-Tags: 1.11.8, mainline, 1, 1.11, latest
-GitCommit: 3e8a6ee0603bf6c9cd8846c5fa43e96b13b0f44b
+Tags: 1.11.9, mainline, 1, 1.11, latest
+GitCommit: e950fa7dfcee74933b1248a7fe345bdbc176fffb
 Directory: mainline/jessie
 
-Tags: 1.11.8-alpine, mainline-alpine, 1-alpine, 1.11-alpine, alpine
-GitCommit: 3e8a6ee0603bf6c9cd8846c5fa43e96b13b0f44b
+Tags: 1.11.9-alpine, mainline-alpine, 1-alpine, 1.11-alpine, alpine
+GitCommit: e950fa7dfcee74933b1248a7fe345bdbc176fffb
 Directory: mainline/alpine
 
 Tags: 1.10.2, stable, 1.10