Roll libc++ and libcxxabi across aligned_alloc.h change

This morally picks up a single upstream PR that touches both
libc++ and libc++abi:

llvm/llvm-project#166172

Since we mirror libc++ and libc++abi separately, this single
commit has been split into one commit in each repo.

...and then there was a follow-up libc++-only buildfix for it:

llvm/llvm-project#169418

To pick both of these up, this rolls libcxxabi by one revision,
and libcxx by two. It combines these two rolls:

1.

Roll libcxxabi from de02e5d57052 to 83a852080747 (1 revision)

https://chromium.googlesource.com/external/github.com/llvm/llvm-project/libcxxabi.git/+log/de02e5d57052..83a852080747

2025-11-24 [email protected] [libc++][NFC] Move __memory/aligned_alloc.h into src/ (#166172)

2.

Roll libc++ from 25731e23e3aa to 13cfd0942dfd (2 revisions)

https://chromium.googlesource.com/external/github.com/llvm/llvm-project/libcxx.git/+log/25731e23e3aa..13cfd0942dfd

2025-11-24 [email protected] Fix path to aligned_alloc.h in #include statement (#169418)
2025-11-24 [email protected] [libc++][NFC] Move __memory/aligned_alloc.h into src/ (#166172)

Change-Id: I04f1081884978d693d8a6dac8089e5c417b355e8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7201052
Commit-Queue: Nico Weber <[email protected]>
Reviewed-by: Hans Wennborg <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1551246}
NOKEYCHECK=True
GitOrigin-RevId: d9b454f01e84d2a064c8a230cd30702cfe2e6a93

Author: chromium-autoroll

deps_revisions.gni

@@ -5,5 +5,5 @@
 declare_args() {
   # Used to cause full rebuilds on libc++ rolls. This should be kept in sync
   # with the libcxx_revision var in //DEPS.
-  libcxx_revision = "91c45fc28459e814889633be985b698c5e8050b4"
+  libcxx_revision = "13cfd0942dfd76fc838d1ead5c3c75a540f4760c"
 }

third_party/libc++/libcxx_headers.gni

@@ -11,7 +11,7 @@
 import("//buildtools/deps_revisions.gni")
 
 assert(
-    libcxx_revision == "91c45fc28459e814889633be985b698c5e8050b4",
+    libcxx_revision == "13cfd0942dfd76fc838d1ead5c3c75a540f4760c",
     "libcxx_headers.gni and third_party/libc++ are out of sync.$0x0A$0x0AIf you were messing around with the libc++ repository, run:$0x0A`buildtools/third_party/libc++/generate_libcxx_headers.py`$0x0A$0x0AIf the script doesn't resolve the error, file a bug to msta@ with reproduction details.$0x0A")
 
 libcxx_headers = [
@@ -586,7 +586,6 @@ libcxx_headers = [
   "//third_party/libc++/src/include/__mdspan/mdspan.h",
   "//third_party/libc++/src/include/__memory/addressof.h",
   "//third_party/libc++/src/include/__memory/align.h",
-  "//third_party/libc++/src/include/__memory/aligned_alloc.h",
   "//third_party/libc++/src/include/__memory/allocate_at_least.h",
   "//third_party/libc++/src/include/__memory/allocation_guard.h",
   "//third_party/libc++/src/include/__memory/allocator.h",