Fix reST markup generated for record redefs.

They should have been using reST roles to xref the original record type
instead of a reST directive to declare a new type.

src/parse.y

@@ -1092,8 +1092,10 @@ decl:
 								new RecordType(fake_type_decl_list);
 							ID* fake = create_dummy_id($3, fake_record);
 							fake_type_decl_list = 0;
-							current_reST_doc->AddRedef(
-								new BroDocObj(fake, reST_doc_comments, true));
+							BroDocObj* o =
+								new BroDocObj(fake, reST_doc_comments, true);
+							o->SetRole(true);
+							current_reST_doc->AddRedef(o);
 							}
 						else
 							{

testing/btest/Baseline/doc.autogen-reST-example/example.rst

@@ -279,7 +279,7 @@ Redefinitions
 
    document the "SimpleEnum" redef here
 
-.. bro:type:: Example::SimpleRecord
+:bro:type:`Example::SimpleRecord`
 
    :Type: :bro:type:`record`