THRIFT-2693 Erlang test leaves a lot of generated files

Patch: Roger Meier
diff --git a/lib/erl/test/test_server.erl b/lib/erl/test/test_server.erl
index 63f7b08..8cabd6f 100644
--- a/lib/erl/test/test_server.erl
+++ b/lib/erl/test/test_server.erl
@@ -21,7 +21,7 @@
 
 -export([go/0, go/1, start_link/2, handle_function/2]).
 
--include("thriftTest_types.hrl").
+-include("gen-erl/thriftTest_types.hrl").
 
 -record(options, {port = 9090,
                   server_opts = []}).