Fix transiflex scripts to explicitly require python2

arduino-core/src/processing/app/i18n/python/pull.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 #vim:set fileencoding=utf-8 sw=2 expandtab
 
 from transifex import Transifex

arduino-core/src/processing/app/i18n/python/push.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 #vim:set fileencoding=utf-8 sw=2 expandtab
 
 from transifex import Transifex

arduino-core/src/processing/app/i18n/python/transifex.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 #vim:set fileencoding=utf-8 sw=2 expandtab
 
 import update

arduino-core/src/processing/app/i18n/python/update.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 #vim:set fileencoding=utf-8 sw=2 expandtab
 
 def unquote(s):

arduino-core/src/processing/app/i18n/update.sh

@@ -28,7 +28,7 @@ catalog()
 update()
 {
   echo -e "Updating $1...\c"
-  cat "$catalog" | python python/update.py "$1"
+  cat "$catalog" | python2 python/update.py "$1"
   msgcat -p "$1" > $(basename "$1" .po).properties
   # msgcat may complain about "CHARSET" if you didn't replace "CHARSET" with
   # your correct charset.