Set PKG_CACHEDIR to an 'All/' directory one level lower
to fix 'pkg repo' generating repository metadata for the
on-disc packages.

MFC after:	3 days
X-MFC-to-10.1:	yes
Sponsored by:	The FreeBSD Foundation


git-svn-id: svn+ssh://svn.freebsd.org/base/head@271480 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f