Roll FreeType from a4c4566b6d51 to 7838c78f53f2 (2 revisions)

https://chromium.googlesource.com/chromium/src/third_party/freetype2.git/+log/a4c4566b6d51..7838c78f53f2

2022-05-23 drott@chromium.org [truetype] Support reading 32bit/16bit VarStore deltas
2022-05-20 drott@chromium.org [truetype] Handle 0xFFFF special value inside delta retrieval function

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/freetype-chromium
Please CC bungeman@google.com,drott@google.com,thestig@google.com on the revert to ensure that a human
is aware of the problem.

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Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

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Tbr: bungeman@google.com,drott@google.com,thestig@google.com
Change-Id: I06a7a52f121ad4dcd4bad4fd1937e7f83a26cf13
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3665540
Commit-Queue: Dominik Röttsches <drott@chromium.org>
Bot-Commit: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Reviewed-by: Dominik Röttsches <drott@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1007288}
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GitOrigin-RevId: b1a023a70b7e2ae146d38a880d613bf5365ca21b

freetype/README.chromium

@@ -1,7 +1,7 @@
 Name: FreeType
 URL: http://www.freetype.org/
-Version: VER-2-12-1-6-ga4c4566b6
-Revision: a4c4566b6d51a0bd60133e1e1a7fcc19e8fcba9e
+Version: VER-2-12-1-8-g7838c78f5
+Revision: 7838c78f53f206ac5b8e9cefde548aa81cb00cf4
 CPEPrefix: cpe:/a:freetype:freetype:2.11.1
 License: Custom license "inspired by the BSD, Artistic, and IJG (Independent
          JPEG Group) licenses"