[compat] Use compat_open()

youtube_dl/extractor/common.py

@@ -25,6 +25,7 @@ from ..compat import (
     compat_integer_types,
     compat_http_client,
     compat_map as map,
+    compat_open as open,
     compat_os_name,
     compat_str,
     compat_urllib_error,

youtube_dl/extractor/openload.py

@@ -7,6 +7,7 @@ import subprocess
 import tempfile
 
 from ..compat import (
+    compat_open as open,
     compat_urlparse,
     compat_kwargs,
 )