Roll src/third_party/fontconfig/src/ 8f169b6a9..09ee17b85 (3 commits)

https://chromium.googlesource.com/external/fontconfig.git/+log/8f169b6a9c6b..09ee17b858c0

$ git log 8f169b6a9..09ee17b85 --date=short --no-merges --format='%ad %ae %s'
2025-07-24 drott [Fontations] Remaining fix for UaF
2025-07-18 akira Add fontconfig version in FcCache
2025-07-18 akira meson: Add a missing fontconfig architecture test case

Created with:
  roll-dep src/third_party/fontconfig/src

Bug: chromium:349952802
Change-Id: Icbf44e1c7313e65b783464ba48053e0f8840153c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6797150
Auto-Submit: Dominik Röttsches <drott@chromium.org>
Reviewed-by: Thomas Anderson <thomasanderson@chromium.org>
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1493859}
NOKEYCHECK=True
GitOrigin-RevId: d44fb92ddf97a649de1e24eb2b216d7ccb0cb3e5