added axi4 wrapper for eth_tester

libraries/io/eth/hdllib.cfg

 hdl_lib_name = eth
 hdl_library_clause_name = eth_lib
-hdl_lib_uses_synth = dp common diag tech_tse
+hdl_lib_uses_synth = dp common diag tech_tse axi4
 hdl_lib_uses_sim = 
 hdl_lib_technology = 
 
@@ -28,6 +28,7 @@ synth_files =
     src/vhdl/eth_tester_tx.vhd
     src/vhdl/eth_tester_rx.vhd
     src/vhdl/eth_tester.vhd
+    src/vhdl/eth_tester_axi4_wrapper.vhd
 
 test_bench_files = 
     src/vhdl/eth_statistics.vhd