[compiler-rt] [builtins] Fix floattitf.c etc. compilation on Solaris/SPARC (PR #70058)

[Rainer Orth via llvm-commits]

rorth wrote:

> Looking at the history for the linked builder, it seems pretty reliable other than this patch of course breaking it. Have you looked into [moving it to the production buildmaster](https://llvm.org/docs/HowToAddABuilder.html#steps-to-add-builder-to-llvm-buildbot)? That way, I would have had an email soon after landing the patch and could have reverted then fixed.

I have indeed, given that there seem to be no spurious failures on the Solaris/sparcv9 buildbot lately.  I'd like to also move the corresponding Solaris/amd64 bot, but that one has one type of failure in `compiler-rt` once in a while which I couldn't reproduce outside of the bot yet, so I guess I'll be moving them separately.

https://github.com/llvm/llvm-project/pull/70058