provider/aws: fix iam login user test

builtin/providers/aws/resource_aws_iam_user_login_profile_test.go

@@ -241,7 +241,9 @@ resource "aws_iam_access_key" "user" {
 
 resource "aws_iam_user_login_profile" "user" {
         user = "${aws_iam_user.user.name}"
-        pgp_key = "%s"
+        pgp_key = <<EOF
+%s
+EOF
 }
 `, r, p, key)
 }