Update amazon-import.html.md

Include usage info and example for `license_type` configuration option

website/source/docs/post-processors/amazon-import.html.md

@@ -58,6 +58,8 @@ Optional:
 
 - `ami_description` (string) - The description to set for the resulting imported AMI. By default this description is generated by the AMI import process.
 
+-   `license_type` (string) - The license type to be used for the Amazon Machine Image (AMI) after importing. Valid values: `AWS` or `BYOL` (default). For more details regarding licensing, see [Prerequisites](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/VMImportPrerequisites.html) in the VM Import/Export User Guide.
+
 ## Basic Example
 
 Here is a basic example. This assumes that the builder has produced an OVA artifact for us to work with, and IAM roles for import exist in the AWS account being imported into.
@@ -69,6 +71,7 @@ Here is a basic example. This assumes that the builder has produced an OVA artif
   "secret_key": "YOUR SECRET KEY HERE",
   "region": "us-east-1",
   "s3_bucket_name": "importbucket",
+  "license_type": "BYOL",
   "tags": {
     "Description": "packer amazon-import {{timestamp}}"
   }