Change the order of arguments of the (One|Two)ByteSeqStringSetChar intrinsic.

test/mjsunit/regress/string-set-char-deopt.js

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 16 matching lines @@
 
 // Flags: --allow-natives-syntax
 
 (function OneByteSeqStringSetCharDeoptOsr() {
   function deopt() {
     %DeoptimizeFunction(f);
   }
 
   function f(string, osr) {
     var world = " world";
-    %_OneByteSeqStringSetChar(string, 0, (deopt(), 0x48));
+    %_OneByteSeqStringSetChar(0, (deopt(), 0x48), string);
 
     if (osr) while (%GetOptimizationStatus(f) == 2) {}
 
     return string + world;
   }
 
   assertEquals("Hello " + "world", f("hello", false));
   %OptimizeFunctionOnNextCall(f);
   assertEquals("Hello " + "world", f("hello", true));
 })();
 
 
 (function OneByteSeqStringSetCharDeopt() {
   function deopt() {
     %DeoptimizeFunction(f);
   }
 
   function g(x) {
   }
 
   function f(string) {
-    g(%_OneByteSeqStringSetChar(string, 0, (deopt(), 0x48)));
+    g(%_OneByteSeqStringSetChar(0, (deopt(), 0x48), string));
     return string;
   }
 
   assertEquals("Hell" + "o", f("hello"));
   %OptimizeFunctionOnNextCall(f);
   assertEquals("Hell" + "o", f("hello"));
 })();
 
 
 (function TwoByteSeqStringSetCharDeopt() {
   function deopt() {
     %DeoptimizeFunction(f);
   }
 
   function g(x) {
   }
 
   function f(string) {
-    g(%_TwoByteSeqStringSetChar(string, 0, (deopt(), 0x48)));
+    g(%_TwoByteSeqStringSetChar(0, (deopt(), 0x48), string));
     return string;
   }
 
   assertEquals("Hell" + "o", f("\u20ACello"));
   %OptimizeFunctionOnNextCall(f);
   assertEquals("Hell" + "o", f("\u20ACello"));
 })();