xapp_mkfontdir: enable for the host

When compiling xfonts, mkfontdir is needed for the host, therefore,
enable it.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/x11r7/xapp_mkfontdir/xapp_mkfontdir.mk

@@ -9,5 +9,7 @@ XAPP_MKFONTDIR_SOURCE = mkfontdir-$(XAPP_MKFONTDIR_VERSION).tar.bz2
 XAPP_MKFONTDIR_SITE = http://xorg.freedesktop.org/releases/individual/app
 XAPP_MKFONTDIR_AUTORECONF = NO
 XAPP_MKFONTDIR_DEPENDENCIES = xapp_mkfontscale
+HOST_XAPP_MKFONTDIR_DEPENDENCIES = host-xapp_mkfontscale
 
 $(eval $(call AUTOTARGETS,package/x11r7,xapp_mkfontdir))
+$(eval $(call AUTOTARGETS,package/x11r7,xapp_mkfontdir,host))