main/postmarketos-artwork: set buildddir (MR 4614)

This allows to build the package locally with pmbootstrap build --src

And is less repetition

main/postmarketos-artwork/APKBUILD

 # Maintainer: Oliver Smith <ollieparanoid@postmarketos.org>
 pkgname=postmarketos-artwork
 pkgver=3
-pkgrel=0
+pkgrel=1
 pkgdesc="Meta package for the postmarketOS artwork"
 url="https://postmarketos.org/"
 arch="noarch"
@@ -16,6 +16,7 @@ subpackages="
 	$pkgname-sounds
 	"
 options="!check"
+builddir="$srcdir"/artwork-$_hash
 
 package() {
 	mkdir -p "$pkgdir"
@@ -24,51 +25,51 @@ package() {
 wallpapers() {
 	pkgdesc="Wallpapers for postmarketOS"
 	mkdir -p "$subpkgdir"/usr/share/wallpapers/
-	install -Dm644 "$srcdir"/artwork-$_hash/wallpapers/logo/pmos-grass-square.jpg \
+	install -Dm644 "$builddir"/wallpapers/logo/pmos-grass-square.jpg \
 		"$subpkgdir"/usr/share/wallpapers/postmarketos.jpg
 }
 
 wallpapers_extra() {
 	pkgdesc="Additional Wallpapers for postmarketOS"
 	mkdir -p "$subpkgdir"/usr/share/wallpapers/
-	install -Dm644 "$srcdir"/artwork-$_hash/wallpapers/extra/* \
+	install -Dm644 "$builddir"/wallpapers/extra/* \
 		"$subpkgdir"/usr/share/wallpapers/
-	install -Dm644 "$srcdir"/artwork-$_hash/wallpapers/logo/postmarketos.jpg \
+	install -Dm644 "$builddir"/wallpapers/logo/postmarketos.jpg \
 		"$subpkgdir"/usr/share/wallpapers/postmarketos-light.jpg
-	install -Dm644 "$srcdir"/artwork-$_hash/wallpapers/logo/logo_dark.jpg \
+	install -Dm644 "$builddir"/wallpapers/logo/logo_dark.jpg \
 		"$subpkgdir"/usr/share/wallpapers/logo_dark.jpg
-	install -Dm644 "$srcdir"/artwork-$_hash/wallpapers/logo/pmos-grass-800x480.jpg \
+	install -Dm644 "$builddir"/wallpapers/logo/pmos-grass-800x480.jpg \
 		"$subpkgdir"/usr/share/wallpapers/pmos-grass-800x480.jpg
-	install -Dm644 "$srcdir"/artwork-$_hash/wallpapers/logo/pmos-grass.jpg \
+	install -Dm644 "$builddir"/wallpapers/logo/pmos-grass.jpg \
 		"$subpkgdir"/usr/share/wallpapers/pmos-grass.jpg
-	install -Dm644 "$srcdir"/artwork-$_hash/wallpapers/logo/pmos.jpg \
+	install -Dm644 "$builddir"/wallpapers/logo/pmos.jpg \
 		"$subpkgdir"/usr/share/wallpapers/pmos.jpg
 }
 
 wallpapers_gnome() {
 	pkgdesc="postmarketOS wallpapers for GNOME"
-	install -Dm644 "$srcdir"/artwork-$_hash/wallpapers/gnome/pmos-light.jpg \
+	install -Dm644 "$builddir"/wallpapers/gnome/pmos-light.jpg \
 		"$subpkgdir"/usr/share/wallpapers/postmarketos-gnome-light.jpg
-	install -Dm644 "$srcdir"/artwork-$_hash/wallpapers/gnome/pmos-dark.jpg \
+	install -Dm644 "$builddir"/wallpapers/gnome/pmos-dark.jpg \
 		"$subpkgdir"/usr/share/wallpapers/postmarketos-gnome-dark.jpg
 }
 
 icons() {
 	pkgdesc="Icons for postmarketOS"
-	install -Dm644 "$srcdir"/artwork-$_hash/logo/logo.svg \
+	install -Dm644 "$builddir"/logo/logo.svg \
 		"$subpkgdir"/usr/share/pixmaps/postmarketos-logo.svg
-	install -Dm644 "$srcdir"/artwork-$_hash/logo/logo-phone.svg \
+	install -Dm644 "$builddir"/logo/logo-phone.svg \
 		"$subpkgdir"/usr/share/pixmaps/postmarketos-logo-phone.svg
 }
 
 sounds() {
 	pkgdesc="Sounds for postmarketOS"
 	mkdir -p "$subpkgdir"/usr/share/sounds/postmarketOS/
-	install -Dm644 "$srcdir"/artwork-$_hash/tones/battery_low.mid \
+	install -Dm644 "$builddir"/tones/battery_low.mid \
 		"$subpkgdir"/usr/share/sounds/postmarketOS/
-	install -Dm644 "$srcdir"/artwork-$_hash/tones/no_signal.mid \
+	install -Dm644 "$builddir"/tones/no_signal.mid \
 		"$subpkgdir"/usr/share/sounds/postmarketOS/
-	install -Dm644 "$srcdir"/artwork-$_hash/tones/startup.mid \
+	install -Dm644 "$builddir"/tones/startup.mid \
 		"$subpkgdir"/usr/share/sounds/postmarketOS/
 }