Change the value of `AT_FDCWD` from -1 to -100. Either value should work,
since the Haiku implementation currently interprets any negative value as
`AT_FDCWD`, however -100 is preferable to -1 since -1 is used for error
return values.
fixes #18809
Change-Id: I53f273dd595c39ea9e4576b90adbbf7f555107cf
Reviewed-on: https://review.haiku-os.org/c/haiku/+/7423
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
b8caef6915