Platform/Loongson: Allow building with stack protector support

Some toolchains have stack protection enabled by default, so without the
appropriate library included the build will fail with missing symbols
during link.

Mail thread with reviews: https://edk2.groups.io/g/devel/message/100746



Cc: Bibo Mao <maobibo@loongson.cn>
Cc: Leif Lindholm <quic_llindhol@quicinc.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: devel@edk2.groups.io
Reviewed-by: Chao Li <lichao@loongson.cn>
Reviewed-by: Xianglai Li <lixianglai@loongson.cn>
Signed-off-by: WANG Xuerui <git@xen0n.name>