Fix python scripts in src/tools/

tools/export_tarball/export_v8_tarball.py

Index: tools/export_tarball/export_v8_tarball.py
diff --git a/tools/export_tarball/export_v8_tarball.py b/tools/export_tarball/export_v8_tarball.py
old mode 100644
new mode 100755
index 3119954328394bc6fcefea7dd8f294c3710a7b03..14f8267c6c70632c8d0faa3cee4e5eea38ccefae
--- a/tools/export_tarball/export_v8_tarball.py
+++ b/tools/export_tarball/export_v8_tarball.py
@@ -1,10 +1,9 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-"""
-This tool creates a tarball with V8 sources, but without .svn directories.
+"""Creates a tarball with V8 sources, but without .svn directories.
 
 This allows easy packaging of V8, synchronized with browser releases.
 
@@ -33,6 +32,7 @@ _V8_PATTERNS = [
   _V8_BUILD_NUMBER_PATTERN,
   _V8_PATCH_LEVEL_PATTERN]
 
+
 def GetV8Version(v8_directory):
   """
   Returns version number as string based on the string
@@ -50,13 +50,16 @@ def GetV8Version(v8_directory):
 
   return '.'.join(version_components)
 
+
 def GetSourceDirectory():
   return os.path.realpath(
     os.path.join(os.path.dirname(__file__), '..', '..', '..', 'src'))
 
+
 def GetV8Directory():
   return os.path.join(GetSourceDirectory(), 'v8')
 
+
 # Workaround lack of the exclude parameter in add method in python-2.4.
 # TODO(phajdan.jr): remove the workaround when it's not needed on the bot.
 class MyTarFile(tarfile.TarFile):
@@ -67,6 +70,7 @@ class MyTarFile(tarfile.TarFile):
 
     tarfile.TarFile.add(self, name, arcname=arcname, recursive=recursive)
 
+
 def main(argv):
   parser = optparse.OptionParser()
   options, args = parser.parse_args(argv)
@@ -99,5 +103,6 @@ def main(argv):
 
   return 0
 
+
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))