Fix 'gbk' codec can't encode character '\u200b' when resolve context (#…

…1508)

Fix 'gbk' codec can't encode character '\u200b' when resolve context.

Signed-off-by: loonghao <hal.long@outlook.com>

src/rez/resolved_context.py

@@ -1443,7 +1443,8 @@ def execute_shell(self, shell=None, parent_environ=None, rcfile=None,
 
         # write out the native context file
         context_code = executor.get_output()
-        with open(context_file, 'w') as f:
+        encoding = {"encoding": "utf-8"} if six.PY3 else {}
+        with open(context_file, 'w', **encoding) as f:
             f.write(context_code)
 
         quiet = quiet or \