main/dtach: modernize and add simple check

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

main/dtach/APKBUILD

@@ -1,36 +1,35 @@
 # Maintainer: Carlo Landmeter <clandmeter@gmail.com>
 pkgname=dtach
 pkgver=0.9
-pkgrel=0
+pkgrel=1
 pkgdesc="A program that emulates the detach feature of screen"
 url="http://dtach.sourceforge.net"
 arch="all"
-license='GPL'
-depends=""
-makedepends=""
+license="GPL"
 source="http://downloads.sourceforge.net/project/${pkgname}/${pkgname}/${pkgver}/${pkgname}-${pkgver}.tar.gz"
 subpackages="$pkgname-doc"
 
-builddir="$srcdir"/dtach-$pkgver
+builddir="$srcdir/$pkgname-$pkgver"
+
 build() {
 	cd "$builddir"
-
 	./configure \
 		--build=$CBUILD \
 		--host=$CHOST \
-		--prefix=/usr \
-		|| return 1
-	make || return 1
+		--prefix=/usr
+	make
+}
+
+check() {
+	cd "$builddir"
+	./dtach --help > /dev/null
 }
 
 package() {
 	cd "$builddir"
-
-	install -Dm755 dtach "$pkgdir"/usr/bin/dtach || return 1
-	install -Dm644 dtach.1 "$pkgdir"/usr/share/man/man1/dtach.1 || return 1
+	install -Dm755 dtach "$pkgdir"/usr/bin/dtach
+	install -Dm644 dtach.1 "$pkgdir"/usr/share/man/man1/dtach.1
 	install -Dm644 README "$pkgdir"/usr/share/doc/dtach/README
 }
 
-md5sums="6dac9c0f96d7d55ea56c01504b23faf6  dtach-0.9.tar.gz"
-sha256sums="32e9fd6923c553c443fab4ec9c1f95d83fa47b771e6e1dafb018c567291492f3  dtach-0.9.tar.gz"
 sha512sums="28c13dc8c96c16b9c6153a3a11fdeb4a4bc72e84e1f2575043b047cd8e600a47232f29544ffd87d82e2575623ec2e999a26e23e9eac25ec81c7722bdf98cfb18  dtach-0.9.tar.gz"