Script Loader: Close the `<link>` tag in `wp_resource_hints()`.

Adjusts tests to match markup change.

Merge of [38443] and [38447] to the 4.6 branch.

Props Chaos Engine, SergeyBiryukov, swissspidy.
Fixes #37800.

Built from https://develop.svn.wordpress.org/branches/4.6@38473


git-svn-id: http://core.svn.wordpress.org/branches/4.6@38414 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/general-template.php

@@ -2853,7 +2853,7 @@ function wp_resource_hints() {
 		$urls = array_unique( $urls );
 
 		foreach ( $urls as $url ) {
-			printf( "<link rel='%s' href='%s'>\n", $relation_type, $url );
+			printf( "<link rel='%s' href='%s' />\n", $relation_type, $url );
 		}
 	}
 }

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.6.1-alpha-38472';
+$wp_version = '4.6.1-alpha-38473';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.