MFH: r490788 r492639

Upgrade to v1.25.0.

Release notes at https://github.com/libuv/libuv/releases/tag/v1.25.0.

Upgrade to v1.26.0.

Release notes at https://github.com/libuv/libuv/releases/tag/v1.26.0.

Approved by: thierry (maintainer)
Approved by: ports-secteam (joneum)