Move the dart2js snapshot into bin directory of sdk root.

sdk/lib/_internal/compiler/implementation/compiler.dart

Index: sdk/lib/_internal/compiler/implementation/compiler.dart
===================================================================
--- sdk/lib/_internal/compiler/implementation/compiler.dart	(revision 21179)
+++ sdk/lib/_internal/compiler/implementation/compiler.dart	(working copy)
@@ -10,22 +10,14 @@
  */
 const bool REPORT_EXCESS_RESOLUTION = false;
 
+const String BUILD_ID = 'NEED_TO_PASS_IN';

[ricow1, 2013/04/10 12:02:20]

Peter: How do you want this passed down?
All the way as parameters from the dart2js script?

+
 /**
  * If true, dump the inferred types after compilation.
  */
 const bool DUMP_INFERRED_TYPES = false;
 
 /**
- * A string to identify the revision or build.
- *
- * This ID is displayed if the compiler crashes and in verbose mode, and is
- * an aid in reproducing bug reports.
- *
- * The actual string is rewritten during the SDK build process.
- */
-const String BUILD_ID = 'build number could not be determined';
-
-/**
  * Contains backend-specific data that is used throughout the compilation of
  * one work item.
  */