Add an aria-label attribute with commenter's name to get_comment_reply_link().

props joedolson, merty, andrewryno.
fixes #16433.
Built from https://develop.svn.wordpress.org/trunk@29822


git-svn-id: http://core.svn.wordpress.org/trunk@29588 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Make link construction in get_comment_reply_link() and get_post_reply_link() more readable.

see #16433.
Built from https://develop.svn.wordpress.org/trunk@29823


git-svn-id: http://core.svn.wordpress.org/trunk@29589 1a063a9b-81f0-0310-95a4-ce76da25c4cd