Fix the snapshotter to generate valid precompilation snapshots

runtime/bin/gen_snapshot.cc

Index: runtime/bin/gen_snapshot.cc
diff --git a/runtime/bin/gen_snapshot.cc b/runtime/bin/gen_snapshot.cc
index d783c8572dc7ea8fdd5fdd79e3100334a8f9ac32..f691f1ee60e47f306f778bb06a2934112cf3f0c7 100644
--- a/runtime/bin/gen_snapshot.cc
+++ b/runtime/bin/gen_snapshot.cc
@@ -435,7 +435,7 @@ static Dart_Handle LoadSnapshotCreationScript(const char* script_name) {
   if (Dart_IsError(source)) {
     return source;
   }
-  return Dart_LoadLibrary(resolved_script_uri, source, 0, 0);
+  return Dart_LoadScript(resolved_script_uri, source, 0, 0);

[siva, 2016/02/09 21:08:34]

This will break dartium, mojo, flutter for Android etc.

You should probably do
if (isSnapshottingForPrecompilation()) {
  return Dart_LoadScript(.....);
} else {
  return Dart_LoadLibrary(.....);
}

 }