Fix interpreter lines for files with python2-only syntax.

Reviewed By: lisroach

Differential Revision: D15362271

fbshipit-source-id: 48fab12ab6e55a8537b19b4623d2545ca9950ec5

coverage/parse_gcov_output.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python2
 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 import re
 import sys

tools/db_crashtest.py

@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python2
 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 import os
 import sys

tools/ldb_test.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python2
 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 import os
 import glob

tools/write_stress_runner.py

@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python2
 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 import subprocess
 import argparse