libecc: add LoongArch support

[zhaoxiaoqiang007_gmail.com]

Summary

Select WORDSIZE 64 for loongarch in words.h.

Signed-off-by: Xiaoqiang Zhao <[e-mail]>

[kevans]

Can you submit this one upstream to https://github.com/libecc/libecc, please?

[zhaoxiaoqiang007_gmail.com]

In D59903#1374756, @kevans wrote:

Can you submit this one upstream to https://github.com/libecc/libecc, please?

Sure!

[zhaoxiaoqiang007_gmail.com]

In D59903#1375060, @zhaoxiaoqiang007_gmail.com wrote:

In D59903#1374756, @kevans wrote:

Can you submit this one upstream to https://github.com/libecc/libecc, please?

Sure!

PR: https://github.com/libecc/libecc/pull/15/

Update: upstream merged

[zhaoxiaoqiang007_gmail.com]

In D59903#1374756, @kevans wrote:

Can you submit this one upstream to https://github.com/libecc/libecc, please?

Since it has been merged by upstream, can you pick up the changes ?

[kevans]

In D59903#1405959, @zhaoxiaoqiang007_gmail.com wrote:

In D59903#1374756, @kevans wrote:

Can you submit this one upstream to https://github.com/libecc/libecc, please?

Since it has been merged by upstream, can you pick up the changes ?

Yes! Give me a day or two, and I will stage a vendor import of libecc.