Build/Test Tools: Add npm-shrinkwrap.json to 4.7.

By shrinkwraping our dependencies, the same versions of everything will be installed no matter what rules the dependency package.json has specified.

Fixes #38657.
Built from https://develop.svn.wordpress.org/branches/4.7@39358


git-svn-id: http://core.svn.wordpress.org/branches/4.7@39298 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/css/edit-rtl.css

@@ -336,7 +336,7 @@ 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;
 }
@@ -1319,7 +1319,7 @@ 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 = '4.7-RC1-39355';
+$wp_version = '4.7-RC1-39358';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.