Updated nginx.

library/nginx

@@ -1,6 +1,6 @@
 # maintainer: NGINX Docker Maintainers <[email protected]> (@nginxinc)
 
-latest: git://github.com/nginxinc/docker-nginx@a19bdf994ab1a5960b998574cf6fcc410992b6ff
-1: git://github.com/nginxinc/docker-nginx@a19bdf994ab1a5960b998574cf6fcc410992b6ff
-1.9: git://github.com/nginxinc/docker-nginx@a19bdf994ab1a5960b998574cf6fcc410992b6ff
-1.9.8: git://github.com/nginxinc/docker-nginx@a19bdf994ab1a5960b998574cf6fcc410992b6ff
+latest: git://github.com/nginxinc/docker-nginx@a8b6da8425c4a41a5dedb1fb52e429232a55ad41
+1: git://github.com/nginxinc/docker-nginx@a8b6da8425c4a41a5dedb1fb52e429232a55ad41
+1.9: git://github.com/nginxinc/docker-nginx@a8b6da8425c4a41a5dedb1fb52e429232a55ad41
+1.9.9: git://github.com/nginxinc/docker-nginx@a8b6da8425c4a41a5dedb1fb52e429232a55ad41