Twenty Seventeen: Add missing labels for `<aside role="complementary">` widget areas.

Props sami.keijonen.
Fixes #42056.
Built from https://develop.svn.wordpress.org/trunk@41687


git-svn-id: http://core.svn.wordpress.org/trunk@41521 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-content/themes/twentyseventeen/sidebar.php

@@ -15,6 +15,6 @@ if ( ! is_active_sidebar( 'sidebar-1' ) ) {
 }
 ?>
 
-<aside id="secondary" class="widget-area" role="complementary">
+<aside id="secondary" class="widget-area" role="complementary" aria-label="<?php esc_attr_e( 'Blog Sidebar', 'twentyseventeen' ); ?>">
 	<?php dynamic_sidebar( 'sidebar-1' ); ?>
 </aside><!-- #secondary -->

wp-content/themes/twentyseventeen/template-parts/footer/footer-widgets.php

@@ -15,7 +15,7 @@ if ( is_active_sidebar( 'sidebar-2' ) ||
 	 is_active_sidebar( 'sidebar-3' ) ) :
 ?>
 
-	<aside class="widget-area" role="complementary">
+	<aside class="widget-area" role="complementary" aria-label="<?php esc_attr_e( 'Footer', 'twentyseventeen' ); ?>">
 		<?php
 		if ( is_active_sidebar( 'sidebar-2' ) ) { ?>
 			<div class="widget-column footer-widget-1">

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9-alpha-41686';
+$wp_version = '4.9-alpha-41687';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.