system/lddtree: add dep on which(1), overhaul build

system/lddtree/APKBUILD

@@ -2,24 +2,17 @@
 # Maintainer: 
 pkgname=lddtree
 pkgver=1.26
-pkgrel=1
+pkgrel=2
 pkgdesc="List dynamic dependencies as a tree"
 url="https://github.com/ncopa/lddtree"
 arch="noarch"
 options="!check"
 license="GPL-2.0-only"
-depends="scanelf"
-depends_dev=""
-makedepends="$depends_dev"
+depends="scanelf cmd:which"
+makedepends=""
 replaces="pax-utils"
-install=""
 subpackages=""
-source="lddtree-$pkgver.tar.gz::https://github.com/ncopa/lddtree/archive/v$pkgver.tar.gz
-	"
-
-build() {
-	return 0
-}
+source="lddtree-$pkgver.tar.gz::https://github.com/ncopa/lddtree/archive/v$pkgver.tar.gz"
 
 package() {
 	cd "$builddir"