build/vcpkg: add host tools

vcpkg.json

@@ -6,6 +6,14 @@
   "homepage": "https://opendht.net",
   "license": "GPL-3.0-or-later",
   "dependencies": [
+    {
+      "name" : "vcpkg-cmake",
+      "host" : true
+    },
+    {
+      "name" : "vcpkg-cmake-config",
+      "host" : true
+    },
     "fmt",
     "nettle",
     "shiftmedia-libgnutls",