scons: Rebuild for python 3.8

scons/PKGBUILD

@@ -3,7 +3,7 @@
 
 pkgname=scons
 pkgver=3.1.2
-pkgrel=2
+pkgrel=3
 pkgdesc="Extensible Python-based build utility"
 arch=('any')
 groups=('base-devel')
@@ -37,11 +37,7 @@ package() {
       --prefix=/usr \
       --install-data=/usr/share \
       --optimize=1 \
-      --root="$pkgdir"
-
-  # fix for python 3
-  sed -i 's:^#!.*bin/env python:#!/usr/bin/python3:' \
-    "$pkgdir"/usr/bin/*
+      --root="${pkgdir}"
 
   install -Dm644 LICENSE.txt \
     "${pkgdir}/usr/share/licenses/${pkgname}/LICENSE"