All the non-ascii characters in THIRD_PARTY_README were replaced with "??" during merges in all/most of the jdk8u repos.

In the root repo:

$ hg anno THIRD_PARTY_README | fgrep '??'
2048: Copyright (c) 2000-2011 France T??l??com
2048: Copyright ?? 2011 Ecma International
2048: Copyright ?? 2001,2003 Keith Packard
2048: Privacy Policy. For trademark usage, see the Unicode?? Consortium Name and
2048: 1. Copyright ?? 1991-2013 Unicode, Inc. All rights reserved.
2048: works conforming to the Unicode?? Standard, subject to Terms and
...
$ h log -r 2048
changeset: 2048:cb29ae4407b9
parent: 2037:c1f5eb3e7d65
parent: 2047:96e057412d5d
user: asaha
date: Sun Jul 02 22:29:54 2017 -0700
summary: Merge
$ hg cat -r 2047 THIRD_PARTY_README | fgrep '??'
$ hg cat -r 2037 THIRD_PARTY_README | fgrep '??'

The other repos are similar.