RegExp: Fix update of lastIndex on non-global sticky

test/mjsunit/harmony/regexp-sticky.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 22 matching lines @@
 assertTrue(!!"..foo*bar".match(re));
 
 var plain = /foobar/;
 
 assertTrue(!!"foobar".match(plain));
 assertTrue(!!"..foobar".match(plain));
 
 var sticky = /foo.bar/y;
 
 assertTrue(!!"foo*bar".match(sticky));
-assertEquals(0, sticky.lastIndex);
+assertEquals(7, sticky.lastIndex);
 assertFalse(!!"..foo*bar".match(sticky));
 
 var stickyplain = /foobar/y;
 
 assertTrue(!!"foobar".match(stickyplain));
-assertEquals(0, stickyplain.lastIndex);
+assertEquals(6, stickyplain.lastIndex);
 assertFalse(!!"..foobar".match(stickyplain));
 
 var global = /foo.bar/g;
 
 assertTrue(global.test("foo*bar"));
 assertFalse(global.test("..foo*bar"));
 global.lastIndex = 0;
 assertTrue(global.test("..foo*bar"));
 
 var plainglobal = /foobar/g;
@@ skipping 63 matching lines @@
 // beginning of a line.
 var hat = /^foo/y;
 hat.lastIndex = 2;
 assertFalse(hat.test("..foo"));
 
 var mhat = /^foo/my;
 mhat.lastIndex = 2;
 assertFalse(mhat.test("..foo"));
 mhat.lastIndex = 2;
 assertTrue(mhat.test(".\nfoo"));