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

test/mjsunit/regress/regress-crbug-320922.js

Index: test/mjsunit/regress/regress-crbug-320922.js
diff --git a/test/mjsunit/regress/regress-crbug-320922.js b/test/mjsunit/regress/regress-crbug-320922.js
index 4a5b5813e025b74b7e48e37c7894d5546e0ae909..9ba759a43ed819eec6d1701e9b7610882e01bfd1 100644
--- a/test/mjsunit/regress/regress-crbug-320922.js
+++ b/test/mjsunit/regress/regress-crbug-320922.js
@@ -30,7 +30,7 @@
 var string = "hello world";
 var expected = "Hello " + "world";
 function Capitalize() {
-  %_OneByteSeqStringSetChar(string, 0, 0x48);
+  %_OneByteSeqStringSetChar(0, 0x48, string);
 }
 Capitalize();
 assertEquals(expected, string);
@@ -40,7 +40,7 @@ assertEquals(expected, string);
 var twobyte = "\u20ACello world";
 
 function TwoByteCapitalize() {
-  %_TwoByteSeqStringSetChar(twobyte, 0, 0x48);
+  %_TwoByteSeqStringSetChar(0, 0x48, twobyte);
 }
 TwoByteCapitalize();
 assertEquals(expected, twobyte);