Adds a flag to the standalone vm to throw an exception on 53-bit integer overflow.

sdk/lib/core/errors.dart

Index: sdk/lib/core/errors.dart
===================================================================
--- sdk/lib/core/errors.dart	(revision 23032)
+++ sdk/lib/core/errors.dart	(working copy)
@@ -234,6 +234,12 @@
   String toString() => "Stack Overflow";
 }
 
+class FiftyThreeBitOverflowError implements Error {
+  final message;
+  const FiftyThreeBitOverflowError(this.message);
+  String toString() => "53 bit overflow: $message";
+}
+
 /**
  * Error thrown when a runtime error occurs.
  */