Support generating the dart vm snapshot binary on Android

runtime/bin/bin.gypi

Index: runtime/bin/bin.gypi
diff --git a/runtime/bin/bin.gypi b/runtime/bin/bin.gypi
index e168bfb0463759b0b2ff38c6b4d234d475cfa042..1872c3d073fa62dda69cae42b7b2e17fbcebb70d 100644
--- a/runtime/bin/bin.gypi
+++ b/runtime/bin/bin.gypi
@@ -349,19 +349,48 @@
        }]],
     },
     {
+      # Generate snapshot bin file.
+      'target_name': 'generate_snapshot_bin',
+      'type': 'none',
+      'dependencies': [
+        'gen_snapshot',
+      ],
+      'actions': [
+        {
+          'action_name': 'generate_snapshot_bin',
+          'inputs': [
+            '../tools/create_snapshot_bin.py',
+            '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)gen_snapshot<(EXECUTABLE_SUFFIX)',
+          ],
+          'outputs': [
+            '<(snapshot_bin_file)',
+          ],
+          'action': [
+            'python',
+            'tools/create_snapshot_bin.py',
+            '--executable',
+            '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)gen_snapshot<(EXECUTABLE_SUFFIX)',
+            '--output_bin', '<(snapshot_bin_file)',
+            '--target_os', '<(OS)'
+          ],
+          'message': 'Generating ''<(snapshot_bin_file)'' file.'
+        },
+      ],
+    },
+    {
       # Generate snapshot file.
       'target_name': 'generate_snapshot_file',
       'type': 'none',
       'dependencies': [
-        'gen_snapshot',
+        'generate_snapshot_bin',
       ],
       'actions': [
         {
           'action_name': 'generate_snapshot_file',
           'inputs': [
             '../tools/create_snapshot_file.py',
-            '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)gen_snapshot<(EXECUTABLE_SUFFIX)',
             '<(snapshot_in_cc_file)',
+            '<(snapshot_bin_file)'
           ],
           'outputs': [
             '<(snapshot_cc_file)',
@@ -369,8 +398,7 @@
           'action': [
             'python',
             'tools/create_snapshot_file.py',
-            '--executable', '<(PRODUCT_DIR)/gen_snapshot',
-            '--output_bin', '<(snapshot_bin_file)',
+            '--input_bin', '<(snapshot_bin_file)',
             '--input_cc', '<(snapshot_in_cc_file)',
             '--output', '<(snapshot_cc_file)',
           ],