[roll] Roll fuchsia [superproject] Roll llvm-project/libc [libc] [NFC] explain compiler macros in limits.h

Differential Revision: https://reviews.llvm.org/D158128

GitOrigin-RevId: 24258dd2c4b98c3f49da76cdbd69b9ba9dcdbfe6
Original-Revision: 77ca84808ab3a4e33dbec83ae2282d2a382d70dd
Roller-URL: https://ci.chromium.org/b/8772539872704238689
CQ-Do-Not-Cancel-Tryjobs: true
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/903659
Original-Revision: 57cc0ce8dbcc81ac527dcbf908e39d1453787718
Change-Id: Iff6c7bfd71d81e24f1db30aa0195dd2c786833b0
diff --git a/stem b/stem
index 6d477a0..a19393f 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="5ec53c4ccc98f9aa6f4d746beb02d3a51767e7aa"/>
+             revision="57cc0ce8dbcc81ac527dcbf908e39d1453787718"/>
   </projects>
   <hooks>
     <hook name="install-environment"