package/jsoncpp: bump to version 1.7.7

Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/jsoncpp/jsoncpp.hash

@@ -1,2 +1,2 @@
 # Locally computed
-sha256	4338c6cab8af8dee6cdfd54e6218bd0533785f552c6162bb083f8dd28bf8fbbe	jsoncpp-1.7.5.tar.gz
+sha256  087640ebcf7fbcfe8e2717a0b9528fff89c52fcf69fa2a18cc2b538008098f97  jsoncpp-1.7.7.tar.gz

package/jsoncpp/jsoncpp.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-JSONCPP_VERSION = 1.7.5
+JSONCPP_VERSION = 1.7.7
 JSONCPP_SITE = $(call github,open-source-parsers,jsoncpp,$(JSONCPP_VERSION))
 JSONCPP_LICENSE = Public Domain or MIT
 JSONCPP_LICENSE_FILES = LICENSE