Get stuff building with newer Bazel with sandboxing

After this, a newer version of Bazel is required to build the code.
201511240708+4433fa6 is the first version which will work.

Change-Id: Ifc41f11f2f21bdcd0f5f7d142d769ea8fa15921a
diff --git a/third_party/libevent/BUILD b/third_party/libevent/BUILD
index 97c4fe2..4a05b48 100644
--- a/third_party/libevent/BUILD
+++ b/third_party/libevent/BUILD
@@ -33,12 +33,14 @@
 
     'evthread_pthread.c',
 
-    'include/event2/event-config.h',
-
     #'compat/sys/queue.h',
   ] + glob([
     '*-internal.h',
+    'include/event2/*.h',
   ]),
+  textual_hdrs = [
+    'arc4random.c',
+  ],
   hdrs = [
     'event.h',
     'evhttp.h',