Add BSTR array marshalling.

AsByValArrayTest without that was not working.

Author: kant2002

src/coreclr/tools/Common/TypeSystem/Interop/IL/MarshalHelpers.cs

@@ -791,6 +791,11 @@ private static MarshallerKind GetArrayElementMarshallerKind(
                         return MarshallerKind.UnicodeString;
                     case NativeTypeKind.LPUTF8Str:
                         return MarshallerKind.UTF8String;
+                    case NativeTypeKind.BStr:
+                    case NativeTypeKind.TBStr:
+                        return MarshallerKind.BSTRString;
+                    case NativeTypeKind.AnsiBStr:
+                        return MarshallerKind.AnsiBSTRString;
                     default:
                         return MarshallerKind.Invalid;
                 }