json-c: change upstream location to Github

json-c website and download locations have changed, the project is now
hosted on Github.

Signed-off-by: Sagaert Johan <sagaert.johan@skynet.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/json-c/Config.in

@@ -8,4 +8,4 @@ config BR2_PACKAGE_JSON_C
 	  them as JSON formatted strings and parse JSON formatted
 	  strings back into the C representation of JSON objects.
 
-	  http://oss.metaparadigm.com/json-c/
+	  https://github.com/json-c/json-c/

package/json-c/json-c.mk

@@ -4,8 +4,8 @@
 #
 ################################################################################
 
-JSON_C_VERSION = 0.11
-JSON_C_SITE = https://s3.amazonaws.com/json-c_releases/releases
+JSON_C_VERSION = json-c-0.11-20130402
+JSON_C_SITE = $(call github,json-c,json-c,$(JSON_C_VERSION))
 JSON_C_INSTALL_STAGING = YES
 JSON_C_MAKE = $(MAKE1)
 JSON_C_CONF_OPTS = --disable-oldname-compat