opkg: make PKG_UPGRADE available during preinst hook

https://dev.openwrt.org/ticket/18479

Signed-off-by: John Crispin <blogic@openwrt.org>

SVN-Revision: 43581
This commit is contained in:
John Crispin 2014-12-08 17:40:53 +00:00
parent aed6b26431
commit ac09fd9a13