[turbofan] Implement OSR for outer loops.

test/mjsunit/compiler/osr-alignment.js

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-// Flags: --use-osr
+// Flags: --use-osr --turbo-osr
 
 function f1() {
   var sum = 0;
   for (var i = 0; i < 1000000; i++) {
     var x = i + 2;
     var y = x + 5;
     var z = y + 3;
     sum += z;
   }
   return sum;
@@ skipping 38 matching lines @@
 function test3() {
   for (var i = 0; i < 2; i++) {
     var j = 11, k = 13, m = 14;
     assertEquals(500009500000, f3());
   }
 }
 
 test1();
 test2();
 test3();