contrib: update dhtnet

Change-Id: I6992f82d0980f266c76985115b8dbf4f609bc87c

contrib/src/dhtnet/package.json

 {
     "name": "dhtnet",
-    "version": "fe79669b400d5e6a521fd1408dae02e0d4e50a5b",
+    "version": "b1bcdecbac2a41de3941ef5a34faa6fbe4472535",
     "url": "https://review.jami.net/plugins/gitiles/dhtnet/+archive/__VERSION__.tar.gz",
     "deps": [
         "opendht",

contrib/src/dhtnet/rules.mak

 # DHTNET
-DHTNET_VERSION := fe79669b400d5e6a521fd1408dae02e0d4e50a5b
+DHTNET_VERSION := b1bcdecbac2a41de3941ef5a34faa6fbe4472535
 DHTNET_URL := https://review.jami.net/plugins/gitiles/dhtnet/+archive/$(DHTNET_VERSION).tar.gz
 
 PKGS += dhtnet