Corrected compile order of pkg for sim.

libraries/base/util/hdllib.cfg

@@ -6,8 +6,8 @@ hdl_lib_technology =
 
 synth_files =
     src/vhdl/util_logic.vhd
-    src/vhdl/util_heater.vhd
     src/vhdl/util_heater_pkg.vhd
+    src/vhdl/util_heater.vhd
 
 test_bench_files = 
     tb/vhdl/tb_util_heater.vhd