Adapt to updated easymock dependency path

Change-Id: I695efcfabe67416104b0efb71f090a5303393702

BUCK

diff --git a/BUCK b/BUCK
index 9f54ac2..263b214 100644
--- a/BUCK
+++ b/BUCK
@@ -22,9 +22,9 @@
     '//gerrit-common:server',
     '//gerrit-reviewdb:server',
     '//gerrit-server:server',
-    '//lib:easymock',
     '//lib:gwtorm',
     '//lib:junit',
+    '//lib/easymock:easymock',
     '//lib/jgit:jgit',
   ],
 )