checkkconfigsymbols.py: set python2 as default interpreter

Some more recent distributions set the default interpreter to python3,
causing the script to break since it's written for python2.

Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/scripts/checkkconfigsymbols.py b/scripts/checkkconfigsymbols.py
index f35c8ac..c89fdca 100755
--- a/scripts/checkkconfigsymbols.py
+++ b/scripts/checkkconfigsymbols.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 """Find Kconfig symbols that are referenced but not defined."""