[roll] Roll fuchsia [superproject] Roll llvm-project/libc Revert "[libc] Implement process_mrelease." (#117807)

Reverts llvm/llvm-project#117503

GitOrigin-RevId: 1f191d4b5f44d69b98a4037dfb31fd1311ac16b2
Original-Revision: dc76a123ac1d7575e8a8fc51750f35d1fe434b29
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1164328
Original-Revision: a86fba66b677cd19c357b4fb0090c4b63de56ab8
Change-Id: Ic83eff136003aff4cd359510d7ca38f75494536b

Author: global-integration-roller

stem

@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="f85baf689cf6e052f75b9165699bf35c93f27b31"/>
+             revision="a86fba66b677cd19c357b4fb0090c4b63de56ab8"/>
   </projects>
   <hooks>
     <hook name="install-environment"