Updating Android library dependencies

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': {
     'gen_source_dir': '<(SHARED_INTERMEDIATE_DIR)',
 
     'io_cc_file': '<(gen_source_dir)/io_gen.cc',
     'io_patch_cc_file': '<(gen_source_dir)/io_patch_gen.cc',
@@ skipping 147 matching lines @@
             },
           },
         }],
         ['OS=="linux"', {
           'link_settings': {
             'libraries': [
               '-ldl',
             ],
           },
         }],
+        ['OS=="android"', {
+          'link_settings': {
+            'libraries': [
+              '-ldl',
+            ],
+          },
+        }],
       ],
     },
     {
       'target_name': 'libdart_io',
       'type': 'static_library',
       'toolsets': ['host', 'target'],
       'include_dirs': [
         '..',
       ],
       'includes': [
@@ skipping 100 matching lines @@
         '<(builtin_cc_file)',
         '<(io_cc_file)',
         '<(io_patch_cc_file)',
       ],
       'conditions': [
         ['OS=="win"', {
           'link_settings': {
             'libraries': [ '-lws2_32.lib', '-lRpcrt4.lib' ],
           },
         }],
-        # Normally, we should not have flags conditional on OS==android, but
-        # here we must because gen_snapshot is compiled for the host during
-        # and Android cross-build, and these flags are not set anywhere else.
-        ['OS=="android"', {
-          'link_settings': {
-            'libraries': [ '-ldl', '-lrt' ],
-          },
-        }]
       ],
     },
     {
       # Generate snapshot bin file.
       'target_name': 'generate_snapshot_bin',
       'type': 'none',
       'toolsets':['host'],
       'dependencies': [
         'gen_snapshot#host',
       ],
@@ skipping 285 matching lines @@
         }],
         ['OS=="linux"', {
           'cflags': [
             '-fPIC',
           ],
         }],
       ],
     },
   ],
 }