package/libminiupnpc: bump to version 2.2.6

https://github.com/miniupnp/miniupnp/blob/miniupnpc_2_2_6/miniupnpc/Changelog.txt

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libminiupnpc/libminiupnpc.hash

@@ -1,3 +1,3 @@
 # Locally computed
-sha256  38acd5f4602f7cf8bcdc1ec30b2d58db2e9912e5d9f5350dd99b06bfdffb517c  miniupnpc-2.2.5.tar.gz
+sha256  37fcd91953508c3e62d6964bb8ffbc5d47f3e13481fa54e6214fcc68704c66f1  miniupnpc-2.2.6.tar.gz
 sha256  e143c6e207d0bb874c4be76b57689ffa408063a37a735c6dcec3dc600cb522c5  LICENSE

package/libminiupnpc/libminiupnpc.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBMINIUPNPC_VERSION = 2.2.5
+LIBMINIUPNPC_VERSION = 2.2.6
 LIBMINIUPNPC_SOURCE = miniupnpc-$(LIBMINIUPNPC_VERSION).tar.gz
 LIBMINIUPNPC_SITE = http://miniupnp.free.fr/files
 LIBMINIUPNPC_INSTALL_STAGING = YES