Remove leading '/' from hardlink name when removing them from the
regular file name. This fixes the problem, when bsdtar can not create
hardlinks to extracted files.

Silence from:	kientzle@
MFC after:	1 week
Sponsored by:	Yandex LLC


git-svn-id: svn+ssh://svn.freebsd.org/base/head@270661 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f