[PATCH] devtools: add RISC-V vector in meson build test

[Thomas Monjalon]

10/11/2025 03:54, sunyuechi at iscas.ac.cn:
> > Maybe we want to replace the generic RISC-V build with the vector one.
> > It could be discussed in another patch.
> 
> I think both scalar and vector build detection should exist,
> because I've seen several times in other projects that after adding vector optimization, 
> the scalar version build failed due to incorrect compilation conditions. 
> Some cautious projects also test various extension combinations. What do you think?

We can test it in a CI, but test-meson-builds.sh is supposed to be run
very frequently by all maintainers. I think it is too much.
As a comparison, in this script we test only
1 Arm target, 1 LoongArch, 1 Power.