Fill in missed values when cloning functions

Signed-off-by: Dimitar Dobrev <[email protected]>

Author: ddobrev

src/AST/Function.cs

@@ -181,13 +181,15 @@ public Function(Function function)
             IsDeleted = function.IsDeleted;
             IsDefaulted = function.IsDefaulted;
             IsAmbiguous = function.IsAmbiguous;
+            IsConstExpr = function.IsConstExpr;
             FriendKind = function.FriendKind;
             OperatorKind = function.OperatorKind;
             CallingConvention = function.CallingConvention;
             SynthKind = function.SynthKind;
             OriginalFunction = function.OriginalFunction;
             Mangled = function.Mangled;
             Signature = function.Signature;
+            Body = function.Body;
             FunctionType = function.FunctionType;
             if (function.SpecializationInfo != null)
             {