Fix path used in generated prolog class names

Force relative paths by passing the Prolog compiler only a relative
name from within $SRCDIR.  This avoids picking up the user's $HOME
path as part of the generated class file names, and prevents build
failures on filesystems where individual path components are limited
to 256 bytes.

Change-Id: I43f2a93daf857413401f4e1aeb24b9b2a8c741fe

gerrit-war/BUCK

diff --git a/gerrit-war/BUCK b/gerrit-war/BUCK
index 0a37f11..8d482bb 100644
--- a/gerrit-war/BUCK
+++ b/gerrit-war/BUCK
@@ -8,8 +8,8 @@
     '//gerrit-lucene:lucene',
     '//gerrit-openid:openid',
     '//gerrit-reviewdb:server',
-    '//gerrit-server:common_rules',
     '//gerrit-server:server',
+    '//gerrit-server/src/main/prolog:common',
     '//gerrit-solr:solr',
     '//gerrit-sshd:sshd',
     '//lib:gwtorm',