This is needed because ipk tools and variables (specically
IPKGCONF_TARGET and IPKGCONF_SDK) are used from the rootfs_ipk.bbclass
I tried to inherit directly but it still fails to expand those.
[YOCTO #2814]
(From OE-Core rev: 161043782682cccd2efc2b349e8248ae084857c7)
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>