- Consolidate libdart and libdart_export by always exporting

runtime/bin/bin.gypi

 # 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.
 
 {
   'variables': {
     'crypto_cc_file': '<(SHARED_INTERMEDIATE_DIR)/crypto_gen.cc',
     'io_cc_file': '<(SHARED_INTERMEDIATE_DIR)/io_gen.cc',
     'io_patch_cc_file': '<(SHARED_INTERMEDIATE_DIR)/io_patch_gen.cc',
     'json_cc_file': '<(SHARED_INTERMEDIATE_DIR)/json_gen.cc',
@@ skipping 524 matching lines @@
           ],
           'message': 'Generating ''<(snapshot_cc_file)'' file.'
         },
       ]
     },
     {
       # dart binary with a snapshot of corelibs built in.
       'target_name': 'dart',
       'type': 'executable',
       'dependencies': [
-        'libdart_export',
+        'libdart',
         'libdart_builtin',
         'libdart_io',
         'generate_snapshot_file',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         'main.cc',
         'builtin_nolib.cc',
@@ skipping 153 matching lines @@
         ['OS=="mac"', {
           'xcode_settings': {
             'OTHER_LDFLAGS': [ '-undefined', 'dynamic_lookup' ],
           },
         }],
       ],
     },
   ],
 }