[roll] Roll fuchsia [dl] Add ConcatView adapter

A partial implementation of C++26 std::views::concat_view that
avoids allocating a temporary vector of pointers in libdl.

Original-Fixed: 373886578
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1139417
Original-Revision: 2641a8c149eab855afbf978b80f7b5c56d67453d
GitOrigin-RevId: e66c792e2870f85423d4b0f3b0a3398dec8aa719
Change-Id: I9aec48e3fd5355d5ae1765d4795d12aa47f729fb

Author: Roland McGrath

stem

@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="6d9abb19c5239d49b9e5124d22b6c26620139eab"/>
+             revision="2641a8c149eab855afbf978b80f7b5c56d67453d"/>
   </projects>
   <hooks>
     <hook name="install-environment"