Don't depend on libdart_io in run_vm_tests and gen_snapshot.

runtime/bin/bin.gypi

Index: runtime/bin/bin.gypi
diff --git a/runtime/bin/bin.gypi b/runtime/bin/bin.gypi
index 2a0b6be65a4e08cb58b9d8051a0588ee8e390557..c80327c2e6003ec00ea0c56d23b9699262bbd484 100644
--- a/runtime/bin/bin.gypi
+++ b/runtime/bin/bin.gypi
@@ -170,7 +170,7 @@
     {
       'target_name': 'libdart_io',
       'type': 'static_library',
-      'toolsets':['target', 'host'],
+      'toolsets':['target'],

[Ivan Posva, 2014/02/25 08:44:35]

I don't think you need to specify target alone, as I was under the impression
that is the default.

[Anders Johnsen, 2014/02/25 08:50:25]

Done.

       'include_dirs': [
         '..',
       ],
@@ -256,7 +256,6 @@
       'dependencies': [
         'libdart_withcore',
         'libdart_builtin',
-        'libdart_io',
       ],
       'include_dirs': [
         '..',
@@ -548,7 +547,6 @@
       'dependencies': [
         'libdart_withcore',
         'libdart_builtin',
-        'libdart_io',
         'generate_snapshot_file#host',
         'generate_snapshot_test_dat_file#host',
       ],