[llvm] [Mips] Fix clang crashes when compiling a variadic function while targeting mips3 (PR #130558)

[Brad Smith via llvm-commits]

brad0 wrote:

> Did you know why occur this failing check `LLVM Premerge Checks / LInux Premerge Checks`? Can we ignore this failing results and commit it directly?

It says to ignore it.

https://github.com/llvm/llvm-project/pull/130558