makepkg: Empty/create only $pkgdir's relevant to current PKGBUILD

Currently makepkg clears the whole $pkgbasedir which is needless. Moreover,
in the obscure case of multiple makepkg runs (with different $pkgname) that
share a $pkgdirbase, only $pkgdir's from the last run will remain. Since
I consider the contents of $pkgdir an important artifact, this commit restricts
the deletion to individual $pkgdir's.

When CLEANUP is set, the behavior is unchanged.

Discussed in:
https://lists.archlinux.org/pipermail/pacman-dev/2015-February/019939.html

Signed-off-by: Allan McRae <allan@archlinux.org>

0 files changed, 0 insertions, 0 deletions