Revert "Renamed the 'dartc' launch script to 'dart_analyzer' and adds it to dart-sdk"

compiler/scripts/dartc_wrapper.py

+#!/usr/bin/env python
+# Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+# for details. All rights reserved. Use of this source code is governed by a
+# BSD-style license that can be found in the LICENSE file.
+
+import os
+import sys
+
+
+def Main():
+  script_name = os.path.basename(sys.argv[0])
+  script_dir = os.path.dirname(sys.argv[0])
+  dartc_script = os.path.join(script_dir, 'compiler', 'bin', 'dartc')
+  os.putenv("DART_SCRIPT_NAME", script_name)
+
+  return os.execv(dartc_script, [dartc_script] + sys.argv[1:])
+
+
+if __name__ == '__main__':
+  sys.exit(Main())