bazel: generate the classpath in a file, for use with eclipse.

Change-Id: I6562c045a7e47c6661889d63f3103e1aeef113ec
diff --git a/gerrit-httpd/BUILD b/gerrit-httpd/BUILD
index 1341ad1..7b20e70 100644
--- a/gerrit-httpd/BUILD
+++ b/gerrit-httpd/BUILD
@@ -1,3 +1,7 @@
+package(
+  default_visibility=["//visibility:public"]
+)
+
 load('//tools/bzl:junit.bzl', 'junit_tests')
 
 SRCS = glob(