image.bbclass: create root symlinks in nativesdk target sysroot
To match with the target image, the generated nativesdk's target sysroot also
should have the root symlinks(/lib*, /bin/, /sbin). So, extended the
'create_merged_usr_symlinks' to reuse symlink creation part even for nativesdk
using POPULATE_SDK_PRE_TARGET_COMMAND.
Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
