Blogs: Allow embedding blog.jquery.com resources on blog.jquerymobile.com

Fix broken image at
https://blog.jquerymobile.com/2010/08/11/announcing-the-jquery-mobile-project/

which reuses an attachment from
https://blog.jquery.com/2010/08/13/the-jquery-project-is-proud-to-announce-the-jquery-mobile-project/

Ref jquery/infrastructure-puppet#17

Author: Krinkle

plugins/jquery-filters.php

@@ -115,8 +115,9 @@
 		$policy[ 'style-src' ] = "'self' 'unsafe-inline' code.jquery.com";
 	} elseif ( get_option( 'jquery_is_blog' ) ) {
 		// Allow <style> in blog posts
+		$policy[ 'style-src' ] = "'self' 'unsafe-inline' code.jquery.com";
 		// Allow re-use of blog post attachments between blog.jquery.com, blog.jqueryui.com, and blog.jquerymobile.com
-		$policy[ 'style-src' ] = "'self' 'unsafe-inline' code.jquery.com blog.jquery.com blog.jqueryui.com blog.jquerymobile.com";
+		$policy[ 'img-src' ] = "'self' data: secure.gravatar.com code.jquery.com blog.jquery.com blog.jqueryui.com blog.jquerymobile.com";
 	}
 
 	$policy_string = '';