[libc] [llvm] [libc] Make sqrtf128 use emulated float128 (PR #216500)

[via llvm-commits]

================
@@ -2698,6 +2698,7 @@ add_entrypoint_object(
   HDRS
     ../sqrtf128.h
   DEPENDS
+  libc.src.__support.CPP.bit
----------------
overmighty wrote:

Nit: indentation.

```suggestion
    libc.src.__support.CPP.bit
```

https://github.com/llvm/llvm-project/pull/216500