xlib_libfontenc: enable compilation on the host

xlib_libfontenc is required to build xapp_mkfontscale on the host,
which in turn is needed to build font encodings for the target.

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

package/x11r7/xlib_libfontenc/xlib_libfontenc.mk

@@ -12,4 +12,7 @@ XLIB_LIBFONTENC_INSTALL_STAGING = YES
 XLIB_LIBFONTENC_DEPENDENCIES = zlib xproto_xproto
 XLIB_LIBFONTENC_CONF_OPT = --enable-shared --disable-static
 
+HOST_XLIB_LIBFONTENC_DEPENDENCIES = host-zlib host-xproto_xproto
+
 $(eval $(call AUTOTARGETS,package/x11r7,xlib_libfontenc))
+$(eval $(call AUTOTARGETS,package/x11r7,xlib_libfontenc,host))