Added technology wrapper tech_xaui for phy_xaui IP.

libraries/technology/xaui/hdllib.cfg

+hdl_lib_name = tech_xaui
+hdl_library_clause_name = tech_xaui_lib
+hdl_lib_uses = technology ip_stratixiv_phy_xaui common dp
+hdl_lib_technology = 
+
+build_sim_dir = $HDL_BUILD_DIR
+build_synth_dir = $HDL_BUILD_DIR
+
+synth_files =
+    tech_xaui_component_pkg.vhd
+
+test_bench_files =