Merge commit 4a39d0890894 from llvm-project (by Mark Johnston):
[libc++] Fix filesystem::remove_all() on FreeBSD (#79540) remove_all_impl() opens the target path with O_NOFOLLOW, which fails if the target is a symbolic link. On FreeBSD, rather than returning ELOOP, openat() returns EMLINK. This is unlikely to change for compatibility reasons, see https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=214633 . Thus, check for EMLINK as well.
Reported by: markj
PR: 276632
MFC after: 3 days
(cherry picked from commit ee14a9725d73150e89367550206803fe36ae3089)