Fixed test to fully deprecate properties.

test/codegen/basic_property_and_return_value.golden

@@ -1,9 +1,8 @@
-cbuffer __PROPERTIES : register(b0) 
+cbuffer properties : register(b0)
 {
-    float4 __PROPERTIES__color;
+    float4 color;
 }
 
-
 float3 vs_main(float3 pos : POSITION) : SV_POSITION
 {
     return pos;
@@ -11,6 +10,6 @@ float3 vs_main(float3 pos : POSITION) : SV_POSITION
 
 float4 ps_main() : SV_TARGET
 {
-    return __PROPERTIES__color;
+    return properties.color;
 }