[37028] missed some logic to capture the base emoji skin tone, to compare to the modified emoji skin tone. This caused all browsers to report that they supported skin tone modifiers, regardless of whether they actually did.
Fixes#36604 for trunk.
Built from https://develop.svn.wordpress.org/trunk@37256
git-svn-id: http://core.svn.wordpress.org/trunk@37222 1a063a9b-81f0-0310-95a4-ce76da25c4cd