Build/Test Tools: Fix PHP 5.2 compatibility for grandchild methods which expect exceptions to be raised.

This is due to `is_callable( 'parent::setExpectedException' )` not being supported on PHP 5.2 when the method being checked only exists on the grandparent class.

See #39822

Merges [40872] and [40873] to the 4.8 branch.

Built from https://develop.svn.wordpress.org/branches/4.8@40875


git-svn-id: http://core.svn.wordpress.org/branches/4.8@40725 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/css/edit-rtl.css

@@ -334,7 +334,7 @@ form#tags-filter {
 }
 
 #content-resize-handle {
-	background: transparent url(../images/resize.gif) no-repeat scroll right bottom;
+	background: transparent url(../images/resize.gif) no-repeat scroll left bottom;
 	width: 12px;
 	cursor: row-resize;
 }
@@ -1311,7 +1311,7 @@ table.links-table {
   (min-resolution: 120dpi) {
 	#content-resize-handle,
 	#post-body .wp_themeSkin .mceStatusbar a.mceResize {
-		background: transparent url(../images/resize-2x.gif) no-repeat scroll right bottom;
+		background: transparent url(../images/resize-2x.gif) no-repeat scroll left bottom;
 		-webkit-background-size: 11px 11px;
 		background-size: 11px 11px;
 	}

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-RC2-40868';
+$wp_version = '4.8-RC2-40875';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.