HLSL: Fix 1201: Accept 'layout' as an identifier.
diff --git a/hlsl/hlslGrammar.cpp b/hlsl/hlslGrammar.cpp
index c71ba16..4cdca76 100755
--- a/hlsl/hlslGrammar.cpp
+++ b/hlsl/hlslGrammar.cpp
@@ -4077,6 +4077,7 @@
     case EHTokMin16int:   return "min16int";
     case EHTokMin12int:   return "min12int";
     case EHTokConstantBuffer: return "ConstantBuffer";
+    case EHTokLayout:     return "layout";
     default:
         return nullptr;
     }