devel/libuv: Update 1.39.0 -> 1.40.0
While here, apply changes from PR 248936:
- Use release archive instead of pulling source from GitHub repo as suggested by 5.4.3 in Porter's Handbook
- Keep "make test" target although add comment about issue running test(s) as root
PR: 248936
Submitted by: daniel.engberg.lists@pyret.net
Sponsored by: Miles AS