main/iftop: update config.sub

main/iftop/APKBUILD

@@ -1,7 +1,7 @@
 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=iftop
 pkgver=0.17
-pkgrel=2
+pkgrel=3
 pkgdesc="iftop does for network usage what top(1) does for CPU usage"
 url="http://www.ex-parrot.com/~pdw/iftop/"
 arch="all"
@@ -11,8 +11,14 @@ makedepends="libpcap-dev>=1 ncurses-dev"
 subpackages="$pkgname-doc"
 source="http://www.ex-parrot.com/~pdw/$pkgname/download/$pkgname-$pkgver.tar.gz"
 
+_builddir="$srcdir"/iftop-$pkgver
+prepare() {
+	cd "$_builddir"
+	update_config_sub
+}
+
 build() {
-	cd "$srcdir/$pkgname-$pkgver"
+	cd "$_builddir"
 	./configure \
 		--build=$CBUILD \
 		--host=$CHOST \
@@ -23,7 +29,7 @@ build() {
 }
 
 package()  {
-	cd "$srcdir/$pkgname-$pkgver"
+	cd "$_builddir"
 	make DESTDIR="$pkgdir" install
 }
 md5sums="062bc8fb3856580319857326e0b8752d  iftop-0.17.tar.gz"