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Changelog [1].  This is necessary to pick up [2] for fixing undefined-shift
UBSAN errors detected by clusterfuzz, [3] to allow removing a build workaround,
[4] to fix a bug and clean up some log spam, [5] to fix CFI builds, and [6] to
fix a use-after-free.

Fontconfig also now requires libuuid as a dependency, so whitelist it as a
dependency since we statically link fontconfig.

[1] https://chromium.googlesource.com/external/fontconfig/+log/b546940435ebfb0df575bc7a2350d1e913919c34..6cc99d6a82ad67d2f5eac887b28bca13c0dfddde
[2] https://chromium.googlesource.com/external/fontconfig/+/c60ed9ef66e59584f8b54323018e9e6c69925c7e
[3] https://chromium.googlesource.com/external/fontconfig/+/b8a225b3c3495942480377b7b3404710c70be914
[4] https://chromium.googlesource.com/external/fontconfig/+/7ad010e80bdf8e41303e322882ece908f5e04c74
[5] https://chromium.googlesource.com/external/fontconfig/+/096e8019be595c2224aaabf98da630ee917ee51c
[6] https://chromium.googlesource.com/external/fontconfig/+/6cc99d6a82ad67d2f5eac887b28bca13c0dfddde

BUG=831146,822737,787020,829890,847323
TBR=thestig,dnicoara

Change-Id: Ic2d1bd19af8ca131c960a30d09246827c115ccec
Reviewed-on: https://chromium-review.googlesource.com/1095538
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Reviewed-by: Thomas Anderson <thomasanderson@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Daniel Nicoara <dnicoara@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567445}