Merge pull request #1969 from uestczyh222/master

修复scons --target=vsc 不支持py3的问题

tools/vsc.py

@@ -37,7 +37,7 @@ def GenerateCFiles(env):
     if not os.path.exists('.vscode'):
         os.mkdir('.vscode')
 
-    vsc_file = file('.vscode/c_cpp_properties.json', 'wb')
+    vsc_file = open('.vscode/c_cpp_properties.json', 'w')
     if vsc_file:
         info = utils.ProjectInfo(env)