package/libmediaart: needs host-vala for introspection

Fix the following build failure raised since commit
3db4d486d689b4a9d59c8f7637211893b0a1cb1b:

../output-1/build/libmediaart-1.9.5/libmediaart/meson.build:63:2: ERROR: Program 'vapigen' not found

Fixes:
 - http://autobuild.buildroot.org/results/189e12686b059ddadf84ced40efcd9875e5e1521

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/libmediaart/libmediaart.mk

@@ -28,7 +28,7 @@ endif
 
 ifeq ($(BR2_PACKAGE_GOBJECT_INTROSPECTION),y)
 LIBMEDIAART_CONF_OPTS += -Dintrospection=true
-LIBMEDIAART_DEPENDENCIES += gobject-introspection
+LIBMEDIAART_DEPENDENCIES += host-vala gobject-introspection
 else
 LIBMEDIAART_CONF_OPTS += -Dintrospection=false
 endif