Add missing dependencies for converters

which are required since I7f9822e06b4097c8b7d93f7510d4616da4fc6d2d moved
converters into a separate BUILD file.

Change-Id: I8022c0c26e723f3e9b3cf3d00c93e921680646c3

BUILD

diff --git a/BUILD b/BUILD
index 205841b..1ac3d33 100644
--- a/BUILD
+++ b/BUILD
@@ -11,6 +11,8 @@
     name = "index-elasticsearch",
     srcs = glob(["src/main/java/**/*.java"]),
     deps = [
+        "//java/com/google/gerrit/entities/converter:converters",
+        "//java/com/google/gerrit/entities/converter:proto_converter",
         "@elasticsearch-rest-client//jar",
         "@httpasyncclient//jar",
         "@httpcore-nio//jar",