MdeModulePkg: Update brotli submodule

Update the brotli submodule to the commit (e230f474).
to avoid build failures in the IA64/LoongArch architecture's
native compiler.

The fundamental reason is that GCC does not support the
__attribute__((model("small"))).
REF:https://github.com/google/brotli/pull/1369

Signed-off-by: Dongyan Qian <qiandongyan@loongson.cn>