Do not sort named parameters on FunctionNode.

pkg/kernel/testcases/spec-mode/named_parameters.baseline.txt

Index: pkg/kernel/testcases/spec-mode/named_parameters.baseline.txt
diff --git a/pkg/kernel/testcases/spec-mode/named_parameters.baseline.txt b/pkg/kernel/testcases/spec-mode/named_parameters.baseline.txt
index b52bfbe1d414e1788acdf3af890058294005b3ec..0963b6403f00449398532b239846a52a5e502a2b 100644
--- a/pkg/kernel/testcases/spec-mode/named_parameters.baseline.txt
+++ b/pkg/kernel/testcases/spec-mode/named_parameters.baseline.txt
@@ -7,7 +7,7 @@ class Superclass extends core::Object {
     : super core::Object::•()
     ;
   method foo({dynamic alpha, dynamic beta}) → dynamic {}
-  method bar({dynamic alpha, dynamic beta}) → dynamic {}
+  method bar({dynamic beta, dynamic alpha}) → dynamic {}
   method namedCallback(({alpha: core::String, beta: core::int}) → dynamic callback) → dynamic {
     callback.call(alpha: "one", beta: 2);
     callback.call(beta: 1, alpha: "two");
@@ -17,11 +17,11 @@ class Subclass extends self::Superclass {
   constructor •() → void
     : super self::Superclass::•()
     ;
-  method foo({dynamic alpha, dynamic beta}) → dynamic {}
+  method foo({dynamic beta, dynamic alpha}) → dynamic {}
   method bar({dynamic alpha, dynamic beta}) → dynamic {}
   method namedCallback(({alpha: core::String, beta: core::int}) → dynamic callback) → dynamic {}
 }
-static method topLevelNamed(dynamic beta, dynamic alpha, {dynamic delta, dynamic gamma}) → dynamic {}
+static method topLevelNamed(dynamic beta, dynamic alpha, {dynamic gamma, dynamic delta}) → dynamic {}
 static method topLevelOptional(dynamic beta, dynamic alpha, [dynamic gamma, dynamic delta]) → dynamic {}
 static method main() → dynamic {
   new self::Subclass::•().foo(beta: 1, alpha: 2);