Add missing wordpress-logo.svg, see #25858.
Built from https://develop.svn.wordpress.org/trunk@26075


git-svn-id: http://core.svn.wordpress.org/trunk@25995 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fixing a typo, see #25858. Props designsimply.
Built from https://develop.svn.wordpress.org/trunk@26076


git-svn-id: http://core.svn.wordpress.org/trunk@25996 1a063a9b-81f0-0310-95a4-ce76da25c4cd