update cityhash from 1.1.0 to 1.1.1

N/A

Change-Id: Ia4f46cab9057c2f94bc36eb88541407120b41498
Signed-off-by: liuhuahang <liuhuahang@zerus.co>
Merge pull request #12 from project-zerus/patch

update cityhash from 1.1.0 to 1.1.1