docs/aws: Add documentation for iam_role/policy import (#10894)

website/source/docs/providers/aws/r/iam_policy.html.markdown

@@ -56,3 +56,11 @@ The following attributes are exported:
 * `name` - The name of the policy.
 * `path` - The path of the policy in IAM.
 * `policy` - The policy document.
+
+## Import
+
+IAM Policies can be imported using the `arn`, e.g.
+
+```
+$ terraform import aws_iam_policy.administrator arn:aws:iam::123456789012:policy/UsersManageOwnCredentials
+```

website/source/docs/providers/aws/r/iam_role.html.markdown

@@ -50,3 +50,11 @@ The following attributes are exported:
 * `arn` - The Amazon Resource Name (ARN) specifying the role.
 * `create_date` - The creation date of the IAM role.
 * `unique_id` - The stable and unique string identifying the role.
+
+## Import
+
+IAM Roles can be imported using the `name`, e.g.
+
+```
+$ terraform import aws_iam_role.developer developer_name
+```