native.bbclass: generate libdir from libdir_native
currently, the libdir in native.bbclass is inherited from target libdir
defined in bitbake.conf. This is not correct in concept, instead, it
should be inherited from libdir_native. Current code works because both
the target libdir and libdir_native are the same value "/usr/lib".
But if libdir changes (e.g. to /usr/lib64), then build will break.
This patch make libdir generated from libdir_native to fix this issue.
Signed-off-by: Yu Ke <ke.yu@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
