fix: log2ram can't stop before it's installed

This commit fixes an issue with `setup/setup_device.sh` where log2ram
service would try to stop before log2ram was installed.  I copied the
log2ram logic from `rootfs/standard/usr/bin/mynode_post_upgrade.sh` as
it looks like it functions correctly.

In the future I think we should add a feature to disable log2ram since
it is really only needed when you are running on an sdcard or USB, but
that will be for another day.

setup/setup_device.sh

@@ -454,17 +454,20 @@ npm install -g yarn
 
 # Install Log2Ram
 if [ $IS_RASPI = 1 ] || [ $IS_X86 = 1 ]; then
+    if [ ! -f /usr/local/bin/log2ram ]; then
         cd /tmp
-    rm -rf log2ram*
+        rm -rf log2ram* || true
         wget https://github.com/azlux/log2ram/archive/v1.2.2.tar.gz -O log2ram.tar.gz
         tar -xvf log2ram.tar.gz
         mv log2ram-* log2ram
         cd log2ram
         chmod +x install.sh
-    service log2ram stop
-    ./install.sh
+        service log2ram stop || true
+        ./install.sh || true
         cd ~
     fi
+fi
+
 
 # Remove existing MOTD login info
 rm -rf /etc/motd