image.bbclass, populate_sdk_base.bbclass: make all variants of qemuwrapper-cross available in sysroots
The variants are needed in particular when executing postinst_intercepts as
those may require running binaries built for different architectures and
against different sets of library paths, when multilib is in use (or nativesdk host
packages are installed), so a single global variant of the script was not working.
I do understand expanding PATH and DEPENDS in this manner is hackish, however
every other approach I could think of is worse.
Signed-off-by: Alexander Kanavin <alexander.kanavin@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
