Roll fontconfig to 1451f82

Changelist:
https://chromium.googlesource.com/external/fontconfig/+log/d1f48f11d5dffa1d954a1b0abe44ce9e4bfc3709..1451f829e750926cec27855eded71c24ac7ac7c6

BUG=427584
TBR=dnicoara

Change-Id: Ic23281b056fa08e8d4a75613fdf4a36aae5838e8
Reviewed-on: https://chromium-review.googlesource.com/1153436Reviewed-by: Thomas Anderson <thomasanderson@chromium.org>
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#578745}

DEPS

@@ -609,7 +609,7 @@ deps = {
 
   # Used for embedded builds. CrOS & Linux use the system version.
   'src/third_party/fontconfig/src': {
-      'url': Var('chromium_git') + '/external/fontconfig.git' + '@' + 'd1f48f11d5dffa1d954a1b0abe44ce9e4bfc3709',
+      'url': Var('chromium_git') + '/external/fontconfig.git' + '@' + '1451f829e750926cec27855eded71c24ac7ac7c6',
       'condition': 'checkout_linux',
   },