cjson: bump to version 1.5.5

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/cjson/cjson.hash

 # Locally computed:
-sha256 0fcf35ce2f28d8696f9cd92a0845d6210d981e2be4c6c6d55692fe3714e5b79b  cjson-v1.5.3.tar.gz
+sha256 f131a3067c78603683f84759de31320444f58d859a77afa77fca858d92ceba60  cjson-v1.5.5.tar.gz

package/cjson/cjson.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-CJSON_VERSION = v1.5.3
+CJSON_VERSION = v1.5.5
 CJSON_SITE = $(call github,DaveGamble,cjson,$(CJSON_VERSION))
 CJSON_INSTALL_STAGING = YES
 CJSON_LICENSE = MIT