Set python via env

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

zbar.spec

@@ -10,6 +10,7 @@ Group:		User Interface/X Hardware Support
 License:	LGPLv2+
 URL:		http://zbar.sourceforge.net/
 Source0:	https://linuxtv.org/downloads/%{name}/%{name}-%{version}.tar.bz2
+Patch0:		zbar_set_python_via_env.patch
 
 
 BuildRequires:	autoconf automake libtool gettext-devel
@@ -88,6 +89,7 @@ scanning widget.
 
 %prep
 %setup -q
+%patch0
 
 %build
 autoreconf -vfi

zbar_set_python_via_env.patch

@@ -0,0 +1,50 @@
+From c750417b3e7c1dc55f2a50fb83fb3713e2f2dde4 Mon Sep 17 00:00:00 2001
+From: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
+Date: Tue, 7 Aug 2018 15:02:11 -0300
+Subject: [PATCH] python: use env to get python's location
+
+Instead of hardcoding python at /usr/bin, use env to get its
+path.
+
+Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
+
+diff --git a/python/examples/processor.py b/python/examples/processor.py
+index 52996d16cf0d..1114c0bf4a3c 100644
+--- a/python/examples/processor.py
++++ b/python/examples/processor.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/python
++#!/usr/bin/env python
+ from sys import argv
+ import zbar
+ 
+diff --git a/python/examples/read_one.py b/python/examples/read_one.py
+index 426b9994155e..3e41c438984c 100644
+--- a/python/examples/read_one.py
++++ b/python/examples/read_one.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/python
++#!/usr/bin/env python
+ from sys import argv
+ import zbar
+ 
+diff --git a/python/examples/scan_image.py b/python/examples/scan_image.py
+index 2a80759da7b5..8c288631e1fc 100644
+--- a/python/examples/scan_image.py
++++ b/python/examples/scan_image.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/python
++#!/usr/bin/env python
+ from sys import argv
+ import zbar
+ import Image
+diff --git a/python/test/test_zbar.py b/python/test/test_zbar.py
+index dbe180324378..78d4f041ed9f 100755
+--- a/python/test/test_zbar.py
++++ b/python/test/test_zbar.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/python
++#!/usr/bin/env python
+ import sys, os, re
+ import unittest as ut
+ import zbar