package/mpd: bump version to 0.19.21

Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/mpd/mpd.hash

@@ -1,2 +1,2 @@
 # Locally calculated after checking pgp signature
-sha256  ecf74993085509c82e2bfadce88434b62b7727d844add9c548eb63532a5e3b8a  mpd-0.19.20.tar.xz
+sha256  8305b8bc026f4b6bde28b8dd09bfdddbe5590acf36358eed4d083a396e301730  mpd-0.19.21.tar.xz

package/mpd/mpd.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 MPD_VERSION_MAJOR = 0.19
-MPD_VERSION = $(MPD_VERSION_MAJOR).20
+MPD_VERSION = $(MPD_VERSION_MAJOR).21
 MPD_SOURCE = mpd-$(MPD_VERSION).tar.xz
 MPD_SITE = http://www.musicpd.org/download/mpd/$(MPD_VERSION_MAJOR)
 MPD_DEPENDENCIES = host-pkgconf boost libglib2