[roll] Roll fuchsia [superproject] Roll llvm-project/libc e2d9ad6..a697cbf (4 commits)

a697cbf [libc][docs] split up platform and arch support (#120125)
b65ea07 [libc] Exclude FreeListHeap test and fuzzer on GPU (#120137)
024bece [libc][docs] Refresh landing page (#120122)
7977992 [libc] Breakup freelist_malloc into separate files (#119806)

GitOrigin-RevId: 67e22d7a5c0dba8283f2c93f0463564bfb79af27
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1175198
Original-Revision: e18598ae2b059ab50a993069688c256a74cb5462
Change-Id: Ia359e39b2bc7d08c030d5cbbac68e13af7213a40
diff --git a/stem b/stem
index 0285d1c..beaee2e 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="85a9bb7b6bb83c18430c032cf73f28b4e31cf7b1"/>
+             revision="e18598ae2b059ab50a993069688c256a74cb5462"/>
   </projects>
   <hooks>
     <hook name="install-environment"