Emoji: Update Emoji CDN filter default for resource hints.

Updates the default value for the filter `emoji_svg_url` used in `wp_resource_hints()` to match the default used for the filter in `_print_emoji_detection_script()`.

See [38717], #38724.

Built from https://develop.svn.wordpress.org/trunk@38764


git-svn-id: http://core.svn.wordpress.org/trunk@38707 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/general-template.php

@@ -2819,7 +2819,7 @@ function wp_resource_hints() {
 	 * The path is removed in the foreach loop below.
 	 */
 	/** This filter is documented in wp-includes/formatting.php */
-	$hints['dns-prefetch'][] = apply_filters( 'emoji_svg_url', 'https://s.w.org/images/core/emoji/2/svg/' );
+	$hints['dns-prefetch'][] = apply_filters( 'emoji_svg_url', 'https://s.w.org/images/core/emoji/2.2.1/svg/' );
 
 	foreach ( $hints as $relation_type => $urls ) {
 		/**

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-alpha-38763';
+$wp_version = '4.7-alpha-38764';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.