The current multilib search path code for packagedata is flawed since it
doesn't correctly handle changes in the TARGET_VENDOR/TARGET_OS that
multilib may make. This patch enhances the code to correctly build the
search paths so multilib packagedata is found correctly.
(From OE-Core rev: f50c5d36b2da9b36d56d95a7d89404509a1a3e9b)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>