HLSL: Additional attribute support: [[]], namespace, parameters:

- support C++11 style brackets [[...]]
- support namespaces [[vk::...]]
- support these on parameter declarations in functions
- support location, binding/set, input attachments

gtests/Hlsl.FromFile.cpp

@@ -99,6 +99,7 @@ INSTANTIATE_TEST_CASE_P(
         {"hlsl.assoc.frag", "PixelShaderFunction"},
         {"hlsl.attribute.frag", "PixelShaderFunction"},
         {"hlsl.attribute.expression.comp", "main"},
+        {"hlsl.attributeC11.frag", "main"},
         {"hlsl.basic.comp", "main"},
         {"hlsl.basic.geom", "main"},
         {"hlsl.boolConv.vert", "main"},