botan, add patch for configure.py for cmd:python3 (#7403)

dev-libs/botan/botan-2.19.2.recipe

@@ -6,11 +6,12 @@ hardware support, password hashing, and post quantum crypto schemes. \
 Botan also has a C89 API specifically designed to be easy to call from other \
 languages."
 HOMEPAGE="https://botan.randombit.net/"
-COPYRIGHT="1999-2018 The Botan Authors"
+COPYRIGHT="1999-2022 The Botan Authors"
 LICENSE="BSD (2-clause)"
-REVISION="1"
+REVISION="2"
 SOURCE_URI="https://github.com/randombit/botan/archive/refs/tags/$portVersion.tar.gz"
 CHECKSUM_SHA256="47bb0330255cf1a439db3f2bc91894b2f41788e58eb71d27e0abf36038d93f1e"
+PATCHES="botan-$portVersion.patchset"
 
 ARCHITECTURES="all !x86_gcc2"
 SECONDARY_ARCHITECTURES="x86"

dev-libs/botan/patches/botan-2.19.2.patchset

@@ -0,0 +1,19 @@
+From 36ed1edcafba861515a6d5bac1b00f3306f98671 Mon Sep 17 00:00:00 2001
+From: begasus <begasus@gmail.com>
+Date: Sun, 13 Nov 2022 08:42:34 +0100
+Subject: botan, add configure.py patch for cmd:python3
+
+
+diff --git a/configure.py b/configure.py
+index 72e02c3..7208e3f 100755
+--- a/configure.py
++++ b/configure.py
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/env python3
+ 
+ """
+ Configuration program for botan
+-- 
+2.37.3
+