Add auto-generated code markers

The presence of these markers in the original code was helpful to me in
figuring out that this portion of the code is auto-generated.
Therefore, I think those are useful and should be present.

Signed-off-by: Gaurav Aggarwal <aggarg@amazon.com>
diff --git a/scripts/data_files/error.fmt b/scripts/data_files/error.fmt
index 4cf3a9d..5699d9e 100644
--- a/scripts/data_files/error.fmt
+++ b/scripts/data_files/error.fmt
@@ -48,7 +48,9 @@
 
     switch( error_code )
     {
+        /* Begin Auto-Generated Code. */
 HIGH_LEVEL_CODE_CHECKS
+        /* End Auto-Generated Code. */
 
         default:
             break;
@@ -63,7 +65,9 @@
 
     switch( error_code )
     {
+        /* Begin Auto-Generated Code. */
 LOW_LEVEL_CODE_CHECKS
+        /* End Auto-Generated Code. */
 
         default:
             break;