[PRQ#44554] Merge Request for x265-hg

MarsSeed [1] filed a request to merge x265-hg [2] into x265-git [3]: Upstream migrated their source code to Bitbucket git repo. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/x265-hg/ [3] https://aur.archlinux.org/pkgbase/x265-git/