kernel.bbclass: Fix Module.symvers support
Starting from v5.8-rc1 commit
269a535ca931 (modpost: generate
vmlinux.symvers and reuse it for the second modpost"), kernel will
generate new vmlinux.symvers instead of dumping all the vmlinux symbols
into Module.symvers in the first pass.
Error log:
'run.do_shared_workdir.16614' failed with exit code 1:
DEBUG: cp: cannot stat 'Module.symvers': No such file or directory
This change will check the file Module.symvers existence before copying it.
Signed-off-by: Lili Li <lili.li@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
