scripts/InstallScripts/InstallPrawnOS.sh: move 'set -e' inside script

Author: austin987

scripts/InstallScripts/InstallPrawnOS.sh

@@ -1,4 +1,6 @@
-#!/bin/bash -e
+#!/bin/bash
+
+set -e
 
 #See the block of "echos" in main() for description of this script