IAM Policy Document Resource format

[jpb]

Laundry did not produce an error for:

Example template:

Resources:
  Policy:
    Type: AWS::IAM::Policy
    Properties:
      PolicyName: LoggingRolePolicy
      PolicyDocument:
        Version: 2012-10-17
        Statement:
          - Action:
              - logs:CreateLogGroup
            Effect: Allow
            Resource:
              - some-string

Error from CloudFormation:

Resource ... must be in ARN format or "*".