testing/dragon: add missing phonon backend dependency

testing/dragon/APKBUILD

@@ -2,18 +2,26 @@
 # Maintainer: Bart Ribbers <bribbers@disroot.org>
 pkgname=dragon
 pkgver=19.08.2
-pkgrel=0
+pkgrel=1
 arch="all"
 url="https://kde.org/applications/multimedia/org.kde.dragonplayer"
 pkgdesc="A multimedia player where the focus is on simplicity, instead of features"
 license="GPL-2.0-only OR GPL-3.0-only"
+depends="phonon-backend-gstreamer"
 makedepends="extra-cmake-modules qt5-qtbase-dev kconfig-dev kconfigwidgets-dev kcoreaddons-dev kcrash-dev kdbusaddons-dev kdoctools-dev ki18n-dev kjobwidgets-dev kio-dev kparts-dev solid-dev kwidgetsaddons-dev kwindowsystem-dev kxmlgui-dev knotifications-dev phonon-dev"
-source="https://download.kde.org/stable/applications/$pkgver/src/$pkgname-$pkgver.tar.xz"
+source="https://download.kde.org/stable/applications/$pkgver/src/dragon-$pkgver.tar.xz"
 subpackages="$pkgname-doc $pkgname-lang"
 options="!check" # No tests
 
+prepare() {
+	default_prepare
+
+	mkdir "$builddir"/build
+}
+
 build() {
-	cmake \
+	cd "$builddir"/build
+	cmake "$builddir" \
 		-DCMAKE_BUILD_TYPE=RelWithDebInfo \
 		-DCMAKE_INSTALL_PREFIX=/usr \
 		-DCMAKE_INSTALL_LIBDIR=lib
@@ -21,10 +29,12 @@ build() {
 }
 
 check() {
+	cd "$builddir"/build
 	CTEST_OUTPUT_ON_FAILURE=TRUE ctest
 }
 
 package() {
+	cd "$builddir"/build
 	DESTDIR="$pkgdir" make install
 }