gyp_addon: link with node.lib on Windows

Closes GH-2685

tools/addon.gypi

@@ -12,6 +12,9 @@
     'conditions': [
       [ 'OS=="mac"', {
         'libraries': [ '-undefined dynamic_lookup' ],
+      }],
+      [ 'OS=="win"', {
+        'libraries': [ '-l<(node_root_dir)/$(Configuration)/node.lib' ],
       }]
     ]
   }

tools/gyp_addon

@@ -16,6 +16,7 @@ if __name__ == '__main__':
   args.extend(['-I', common_gypi])
   args.extend(['-Dlibrary=shared_library'])
   args.extend(['-Dvisibility=default'])
+  args.extend(['-Dnode_root_dir=%s' % node_root])
   args.extend(['--depth=.']);
 
   gyp_args = list(args)