support/scripts: fix shebang with python

Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

support/scripts/graph-depends

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 
 # Usage (the graphviz package must be installed in your distribution)
 #  ./support/scripts/graph-depends [-p package-name] > test.dot

support/scripts/scanpypi

@@ -1,4 +1,4 @@
-#!/usr/bin/python2
+#!/usr/bin/env python2
 """
 
 Utility for building Buildroot packages for existing PyPI packages

support/scripts/xorg-release

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 
 # This script generates a report on the packaging status of X.org
 # releases in Buildroot. It does so by downloading the list of