mpd: update to 0.19.21

mpd/PKGBUILD

@@ -1,7 +1,7 @@
 # Contributions from Arch: https://projects.archlinux.org/svntogit/packages.git/tree/trunk/PKGBUILD?h=packages/mpd
 
 pkgname=mpd
-pkgver=0.19.19
+pkgver=0.19.21
 pkgrel=1
 pkgdesc='Flexible, powerful, server-side application for playing music'
 url='http://www.musicpd.org/'
@@ -17,10 +17,16 @@ source=("http://www.musicpd.org/download/mpd/stable/${pkgname}-${pkgver}.tar.xz"
         'mpd.conf')
 backup=('etc/mpd.conf')
 install=install
-sha256sums=('bc856cda4136403446d53d11576f86990b61d1fe4668f6008e9eae47450d4e1d'
+sha256sums=('8305b8bc026f4b6bde28b8dd09bfdddbe5590acf36358eed4d083a396e301730'
             'c1683ba35774c85e16c70e89f7e2ed1c09619512b1a273daabbd5e34d40439bd'
             'f40f68205834ca53cea3372e930bfe6c2f9ecc9df3b1605df2fec63a658b2e03')
 
+prepare() {
+	# Temporary; see Arch's FS#48372
+	install -d "${srcdir}"/pkg-config
+	ln -s /usr/lib/pkgconfig/libsystemd.pc "${srcdir}"/pkg-config/libsystemd-daemon.pc
+}
+
 build() {
     cd "${srcdir}/${pkgname}-${pkgver}"