jansson: Update to version 2.13.1

This also sets the ABI_VERSION as this is a versioned shared library.

The ipk sizes for mips_24Kc change like this:
old:
jansson_2.12-1_mips_24kc.ipk	18.692

new:
jansson4_2.13.1-1_mips_24kc.ipk	19.171

Signed-off-by: Hauke Mehrtens <[email protected]>

package/libs/jansson/Makefile

@@ -8,14 +8,14 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=jansson
-PKG_VERSION:=2.12
+PKG_VERSION:=2.13.1
 PKG_RELEASE:=1
 PKG_LICENSE:=MIT
 PKG_LICENSE_FILES:=LICENSE
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=http://www.digip.org/jansson/releases/
-PKG_HASH:=645d72cc5dbebd4df608d33988e55aa42a7661039e19a379fcbe5c79d1aee1d2
+PKG_HASH:=ee90a0f879d2b7b7159124ff22b937a2a9a8c36d3bb65d1da7dd3f04370a10bd
 
 include $(INCLUDE_DIR)/package.mk
 include $(INCLUDE_DIR)/cmake.mk
@@ -32,6 +32,7 @@ define Package/jansson
   CATEGORY:=Libraries
   TITLE:=Jansson library
   URL:=http://www.digip.org/jansson/
+  ABI_VERSION:=4
 endef
 
 define Package/jansson/description