Upgrade javaEWAH to 1.1.6

To match the version used in the latest JGit snapshot.

Change-Id: I2a69981625854d1aaf9719faeec0eab7dd6c3fb6

lib/jgit/BUCK

diff --git a/lib/jgit/BUCK b/lib/jgit/BUCK
index 456f167..20f8863 100644
--- a/lib/jgit/BUCK
+++ b/lib/jgit/BUCK
@@ -62,8 +62,8 @@
 
 maven_jar(
   name = 'ewah',
-  id = 'com.googlecode.javaewah:JavaEWAH:0.7.9',
-  sha1 = 'eceaf316a8faf0e794296ebe158ae110c7d72a5a',
+  id = 'com.googlecode.javaewah:JavaEWAH:1.1.6',
+  sha1 = '94ad16d728b374d65bd897625f3fbb3da223a2b6',
 )
 
 maven_jar(