community/mktorrent: modernize and add simple check

Add a simple test as upstream doesn't provide a test suite.

community/mktorrent/APKBUILD

@@ -2,20 +2,25 @@
 # Maintainer:  Francesco Colista <fcolista@alpinelinux.org>
 pkgname=mktorrent
 pkgver=1.1
-pkgrel=0
+pkgrel=1
 pkgdesc="A handy tool for creating .torrent files"
 url="http://borg.uu3.net/~borg/?mktorrent"
 arch="all"
 license="BSD"
-depends=""
 makedepends="libressl-dev"
-install=""
 subpackages="$pkgname-doc"
 source="$pkgname-$pkgver.tar.gz::https://github.com/Rudde/mktorrent/archive/v$pkgver.tar.gz"
-builddir="$srcdir"/$pkgname-$pkgver
+
+builddir="$srcdir/$pkgname-$pkgver"
+
 build() {
 	cd "$builddir"
-	make || return 1
+	make
+}
+
+check() {
+	cd "$builddir"
+	./mktorrent -h > /dev/null
 }
 
 package() {