Update 64-bit instructions

See issue #433 Make sure the executables (setuid wrappers and pijuiceboot)  are rebuild for 64-bit

Software/OS Support/ubuntu_server_64.MD

@@ -1,27 +1,45 @@
 # Installing PiJuice Software on Ubuntu Server 64-bit
 
-
 https://ubuntu.com/download/raspberry-pi
 
-1. Make sure you have the latest version of Kali Linux by running an update:
-`sudo apt-get update`
+1. Run the following script to build the pijuice packages for 64-bit (thanks to @MarkusLange):
+```
+#!/bin/bash
 
-2. Install the dependancies:
-`sudo apt install i2c-tools lua5.3 build-essential`
+cd $HOME
 
-5. Clone the PiJuice repository from GitHub:
-`git clone https:/PiSupply/PiJuice.git`
+sudo apt update
+sudo apt install -y python3-smbus python3-pip python3-stdeb dh-systemd debhelper fakeroot python3-all
+sudo pip3 install stem stdeb3
 
-6. Install pijuice-base:
-`cd PiJuice/Software/Install`
-`sudo dpkg -i pijuice-base_1.6_all.deb`
+sudo git clone https:/PiSupply/PiJuice.git
 
-Fix broken packages:
-`sudo apt --fix-broken install`
+cd $HOME/PiJuice/Software/Source/Setuid-Wrapper
+sudo ./build-setuid-progs.sh
+sudo cp p* $HOME/PiJuice/Software/Source/bin
+
+cd $HOME/PiJuice/Software/Source/
+sudo ./pckg-pijuice.sh
+
+sudo cp $HOME/PiJuice/Software/Source/deb_dist_base/pi*.deb $HOME
+sudo cp $HOME/PiJuice/Software/Source/deb_dist_gui/pi*.deb $HOME
 
+cd $HOME
+sudo rm -rf PiJuice
+```
 
+2. Install the localpijuice-base:
+`cd $HOME`
+`sudo apt install pijuice-base_1.6_all.deb`
+
+3. Install the local pijuice-gui (if needed):
+`cd $HOME`
+`sudo apt install pijuice-gui_1.6_all.deb`
+
+4. Fix broken packages:
+`sudo apt --fix-broken install`
 
-7. Reboot and run PiJuice CLI:
+5. Reboot and run PiJuice CLI or PiJUICE_CLI when on Desktop:
 `sudo reboot`
 Once rebooted run:
-`pijuice_cli`
+`pijuice_cli` or `pijuice_gui`

Software/Source/Setuid-Wrapper/build-setuid-progs.sh

@@ -1,3 +1,5 @@
 #!/bin/bash
 gcc -DFULL_PATH=\"/usr/bin/pijuice_gui.py\" -Wall -o pijuice_gui setuid-prog.c
 gcc -DFULL_PATH=\"/usr/bin/pijuice_cli.py\" -Wall -o pijuice_cli setuid-prog.c
+# Also build pijuiceboot so all programs are build for the current architecture (32 or 64 bit)
+gcc -Wall -o pijuiceboot ../../../Firmware/pijuiceboot.c