main/postmarketos-welcome-gtk3: modernize (MR 1538)

main/postmarketos-welcome-gtk3/APKBUILD

 # Maintainer: Oliver Smith <ollieparanoid@postmarketos.org>
 pkgname=postmarketos-welcome-gtk3
 pkgver=0.2.0
-pkgrel=0
+pkgrel=1
 pkgdesc="postmarketOS welcome app"
 url="https://gitlab.com/postmarketOS/postmarketos-welcome-gtk3"
 arch="all"
@@ -11,18 +11,12 @@ source="https://gitlab.com/postmarketOS/postmarketos-welcome-gtk3/-/archive/$pkg
 options="!check" # No tests
 
 build() {
-	meson \
-		--prefix=/usr \
-		--sysconfdir=/etc \
-		--mandir=/usr/share/man \
-		--localstatedir=/var \
-		--buildtype=plain \
-		. output
-	ninja -C output
+	abuild-meson . output
+	meson compile ${JOBS:+-j ${JOBS}} -C output
 }
 
 package() {
-	DESTDIR="$pkgdir" ninja -C output install
+	DESTDIR="$pkgdir" meson install -C output
 
 	install -Dm644 "data/welcome-message" \
 		"$pkgdir/etc/welcome-message"