Added two missing dependencies.

Autoconf and libtool were missing.

doc/bulding-on-ubuntu-debian.md

@@ -3,7 +3,7 @@
 ## Install
 
 1. sudo apt-get update
-1. sudo apt-get install build-essential libssl-dev libboost-all-dev libdb++-dev libminiupnpc-dev git openssl
+1. sudo apt-get install build-essential libssl-dev libboost-all-dev libdb++-dev libminiupnpc-dev git openssl autoconf libtool
 1. git clone https://github.com/miguelfreitas/twister-core.git
 1. cd twister-core/libtorrent
 1. ./bootstrap.sh --with-boost-libdir=/usr/lib/x86_64-linux-gnu