hulk inclusion
bugzilla: https://gitee.com/openeuler/kernel/issues/I68D0O

Reference: https://gitee.com/openeuler/kernel/pulls/286
Reference: https://gitee.com/openeuler/kernel/commit/ca1af5899ef7c1e1617913ecee37d53972f701fb

update_oedefconfig:run make openeuler_defconfig and copy .config to arch/$(SRCARCH)/configs/openeuler_defconfig
save_oedefconfig:copy .config to arch/$(SRCARCH)/configs/openeuler_defconfig
Signed-off-by: NLiu Chao <liuchao173@huawei.com>
[XQ: 1. update helper message
     2. remove more auto generated CONFIG.]
Signed-off-by: NXie XiuQi <xiexiuqi@huawei.com>