Add stack protector implementation for RISC-V architecture using a
global __stack_chk_guard variable. This differs from x86 which uses
per-CPU stack canaries.
Tracked-On: #8834
Signed-off-by: Jian Jun Chen <jian.jun.chen@intel.com>
Reviewed-by: Fei Li <fei1.li@intel.com>
Acked-by: Wang, Yu1 <yu1.wang@intel.com>
