libpcre2: upgrade 10.39 -> 10.40

Security fixes and update to Unicode property handling.

Upstream release notes:
https://github.com/PCRE2Project/pcre2/releases/tag/pcre2-10.40



CVE: CVE-2022-1587

Signed-off-by: Davide Gardenal <davide.gardenal@huawei.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>