Bump gitiles-servlet version to 0.1-9

Starting from 0.1-9 the blame-cache is extracted out of the gitiles-servlet
and is provided via gerrit-plugin-api to plugins.

Change-Id: I3460ef24ad67c8ef8225b8f290570282a3950e38
diff --git a/BUCK b/BUCK
index 2e4ffe4..62edda8 100644
--- a/BUCK
+++ b/BUCK
@@ -49,8 +49,8 @@
 
 maven_jar(
   name = 'gitiles-servlet',
-  id = 'com.google.gitiles:gitiles-servlet:0.1-8',
-  sha1 = 'e3210ae4d89bc6df5a87fee559300e7b602fec94',
+  id = 'com.google.gitiles:gitiles-servlet:0.1-9',
+  sha1 = '653b054661425499b55400888c35b55089f8816b',
   deps = [':prettify'],
   license = 'Apache2.0',
   repository = GERRIT,