kernel-devsrc: adjust NM and OBJTOOL variables for target
v5.13 has started storting the values for NM and OBJTOOL in
auto.conf.cmd
Just as we've done for other tools, we need to adjust NM and
OBJTOOL to the names of the on-target executables. With this
adjustment, 'make scripts prepare' continues to work without
user intervention on the target.
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>