package/libdvdread: needs host-pkgconf

Add host-pkgconf to the dependencies since pkg-config is used to find
libdvdcss.

Fixes:
http://autobuild.buildroot.net/results/e5f/e5fffdd51bdd6962149a836af1e7a6bbc6bae20c

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libdvdread/libdvdread.mk

@@ -11,6 +11,6 @@ LIBDVDREAD_INSTALL_STAGING = YES
 LIBDVDREAD_LICENSE = GPLv2+
 LIBDVDREAD_LICENSE_FILES = COPYING
 LIBDVDREAD_CONF_OPTS = --with-libdvdcss
-LIBDVDREAD_DEPENDENCIES = libdvdcss
+LIBDVDREAD_DEPENDENCIES = libdvdcss host-pkgconf
 
 $(eval $(autotools-package))