add example preflight script

Author: erikng

installapplications/scripts/root/ia_preflight.py

@@ -0,0 +1,24 @@
+#!/usr/bin/python
+import os
+
+
+def check():
+    validated = True
+    filetocheck = '/path/to/file/file.ext'
+    if not os.path.isfile(filetocheck):
+        validated = False
+
+    return validated
+
+
+def main():
+    if check():
+        # Our checks passed, so we can skip the bootstrap process.
+        exit(0)
+    else:
+        # Our checks didn't pass, so we need to run the bootstrap process.
+        exit(1)
+
+
+if __name__ == '__main__':
+    main()