Bump gitiles-servlet to 0.1-7

Includes a fix for gitiles issue 91 [1].

[1] https://code.google.com/p/gitiles/issues/detail?id=91

Change-Id: Ia4bef64d78845bed11dbacfdd9fd486f21a3cb29

BUCK

diff --git a/BUCK b/BUCK
index c5af8bd..c86a9eb 100644
--- a/BUCK
+++ b/BUCK
@@ -51,8 +51,8 @@
 
 maven_jar(
   name = 'gitiles-servlet',
-  id = 'com.google.gitiles:gitiles-servlet:0.1-6',
-  sha1 = '233fbe1315205861ac1adc3d77a3d5037f97fbaa',
+  id = 'com.google.gitiles:gitiles-servlet:0.1-7',
+  sha1 = '5166c0adbf7c63e28d894dcda65cea051e07043f',
   deps = [':prettify'],
   license = 'Apache2.0',
   repository = GERRIT,