[roll] Roll fuchsia [superproject] Roll llvm-project/libc [libc][math] Fix sqrtf128 implicit conversions. (#127154)

This fixes rv32 buildbot failure from
https://github.com/llvm/llvm-project/pull/122578

GitOrigin-RevId: b88081218f11cb80ec75c8ed2051a067c21b6dda
Original-Revision: 6883a65d2f6b09b7e6314ee3cfd8a8a955ff2ced
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1207844
Original-Revision: 3f13acf426aa429966f5766c7c2e8f132255d645
Change-Id: I8e10dfb9112e8ba464e22a823e173766de9e779f
diff --git a/stem b/stem
index 83f7b93..1d02ccd 100644
--- a/stem
+++ b/stem
@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="1059eaec47d3e63c4fb53226ec750506f4767a18"/>
+             revision="3f13acf426aa429966f5766c7c2e8f132255d645"/>
   </projects>
   <hooks>
     <hook name="install-environment"