Ensure that svn-eolstyle is set to native for all textual content files

[westi]

This is causing an issue where patches / code are generated on a system with one EOL style and then edited elsewhere e.g. #3217

So far I've found the following files, in trunk, don't have this svn property set:

• wp-admin/admin-ajax.php
• wp-admin/categories.js
• wp-admin/comment.php
• wp-admin/custom-fields.js
• wp-admin/dbx-admin-key-js.php
• wp-admin/edit-category-form.php
• wp-admin/export.php
• wp-admin/install.css
• wp-admin/install-rtl.css
• wp-admin/link.php
• wp-admin/options-privacy.php
• wp-admin/page.php
• wp-admin/post-new.php
• wp-admin/rtl.css
• wp-admin/upload.css
• wp-admin/upload-functions.php
• wp-admin/upload-js.php
• wp-admin/upload-rtl.css
• wp-admin/users.js
• wp-includes/plugin.php
• wp-includes/script-loader.php
• wp-includes/user.php

[Sewar]

[4421] sets svn-eolstyle to native for CSS files.

[ryan]

(In [4424]) Set eol style. fixes #3264