json-c: bump to version 0.12.1-20160607

[Peter: stick to the github helper]
Signed-off-by: Danomi Manchego <danomimanchego123@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/json-c/json-c.hash

@@ -1,2 +1,2 @@
 # Locally calculated
-sha256 99304a4a633f1ee281d6a521155a182824dd995139d5ed6ee5c93093c281092b  json-c-json-c-0.12-20140410.tar.gz
+sha256 989e09b99ded277a0a651cd18b81fcb76885fea08769d7a21b6da39fb8a34816  json-c-json-c-0.12.1-20160607.tar.gz

package/json-c/json-c.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-JSON_C_VERSION = json-c-0.12-20140410
+JSON_C_VERSION = json-c-0.12.1-20160607
 JSON_C_SITE = $(call github,json-c,json-c,$(JSON_C_VERSION))
 JSON_C_INSTALL_STAGING = YES
 JSON_C_MAKE = $(MAKE1)