Disable SkTypeface FromFontConfigInterfaceIdAndTtcIndex on Fuchsia.

Previously this method of creating an SkTypeface was not-implemented
under Fuchsia, but that was changed during the refactoring in
https://chromium-review.googlesource.com/c/chromium/src/+/1238540

We restore OS_FUCHSIA as a platform on which this method is not-
implemented, to avoid the SkFontConfigInterface::RefGlobal() reference
breaking our Debug builds.

CQ_INCLUDE_TRYBOTS=luci.chromium.try:fuchsia-fyi-x64-dbg

Bug: 816445
Change-Id: Ib14023478e65a8b9c59886a579d60a5be7e00aff
Reviewed-on: https://chromium-review.googlesource.com/1243571Reviewed-by: Dominik Röttsches <drott@chromium.org>
Commit-Queue: Wez <wez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#594086}

third_party/blink/renderer/platform/fonts/skia/sktypeface_factory.cc

@@ -15,7 +15,8 @@ namespace blink {
 sk_sp<SkTypeface> SkTypeface_Factory::FromFontConfigInterfaceIdAndTtcIndex(
     int config_id,
     int ttc_index) {
-#if !defined(OS_MACOSX) && !defined(OS_ANDROID) && !defined(OS_WIN)
+#if !defined(OS_MACOSX) && !defined(OS_ANDROID) && !defined(OS_WIN) && \
+    !defined(OS_FUCHSIA)
   sk_sp<SkFontConfigInterface> fci(SkFontConfigInterface::RefGlobal());
   SkFontConfigInterface::FontIdentity font_identity;
   font_identity.fID = config_id;