libidn: bump to version 1.24

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/libidn/libidn.mk

@@ -4,8 +4,8 @@
 #
 #############################################################
 
-LIBIDN_VERSION = 1.19
-LIBIDN_SITE = http://ftp.gnu.org/gnu/libidn/
+LIBIDN_VERSION = 1.24
+LIBIDN_SITE = $(BR2_GNU_MIRROR)/libidn
 LIBIDN_INSTALL_STAGING = YES
 LIBIDN_CONF_ENV = EMACS="no"
 LIBIDN_CONF_OPT = --disable-java --enable-csharp=no