compiler-rt: Fails to build `lib/builtins/fp_lib.h:413:2: error: Unsupported TF mode type`

[sylvestre]

On linux amd64 on Ubuntu Jammy:

/build/source/build-llvm/./bin/clang --target=x86_64-pc-linux-gnu -DVISIBILITY_HIDDEN  -fstack-protector-strong -Wformat -Werror=format-security -Wno-unused-command-line-argument -Wdate-time -D_FORTIFY_SOURCE=2 -O3 -DNDEBUG -m32 -fno-lto -std=c11 -fPIC -fno-builtin -fvisibility=hidden -fomit-frame-pointer -MD -MT CMakeFiles/clang_rt.builtins-i386.dir/extendxftf2.c.o -MF CMakeFiles/clang_rt.builtins-i386.dir/extendxftf2.c.o.d -o CMakeFiles/clang_rt.builtins-i386.dir/extendxftf2.c.o -c /build/source/compiler-rt/lib/builtins/extendxftf2.c
In file included from /build/source/compiler-rt/lib/builtins/extendxftf2.c:13:
/build/source/compiler-rt/lib/builtins/fp_lib.h:413:2: error: Unsupported TF mode type
  413 | #error Unsupported TF mode type
      |  ^
1 error generated.

Full log:
https://llvm-jenkins.debian.net/job/llvm-toolchain-jammy-binaries/architecture=amd64,distribution=jammy,label=amd64/1238/consoleFull

good hash: 8f90e69
bad: cc0065a

[sylvestre]

dupe of
#77880