kerl erlang/zx/gajudesk script

This needed a 64-bit debian system to build, so I guess I'll just test
64 bit systems from now on.

debian/install_scripts/install_wallet_src

@@ -0,0 +1,20 @@
+#!/bin/sh
+sudo apt update
+sudo apt upgrade
+sudo apt -y install \
+    gcc curl g++ dpkg-dev build-essential automake autoconf \
+    libncurses-dev libssl-dev flex xsltproc libwxgtk3.2-dev \
+    wget vim git
+mkdir -p ~/vcs ~/bin
+cd ~/vcs
+
+curl -O https://raw.githubusercontent.com/kerl/kerl/master/kerl
+chmod a+x kerl
+./kerl build 27.3.4 27.3.4
+./kerl install 27.3.4 ~/.erts/27.3.4
+echo '. "$HOME"/.erts/27.3.2/activate' >> .bashrc
+. ~/.erts/27.3.4/activate
+
+wget -q https://zxq9.com/projects/zomp/get_zx && bash get_zx
+export PATH=$PATH:$HOME/bin
+zx run gajudesk