Blacklist serialize-8888 typefacerendering_pfaMac

BUG=skia:5778
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2356753003

TBR=halcanary@google.com
NOTREECHECKS=true
CQ_INCLUDE_TRYBOTS=master.client.skia:Test-Mac-Clang-MacMini6.2-CPU-AVX-x86_64-Debug-GN-Trybot

Review-Url: https://codereview.chromium.org/2356753003
diff --git a/infra/bots/recipes/swarm_test.expected/Test-Ubuntu-GCC-GCE-CPU-AVX2-x86-Debug.json b/infra/bots/recipes/swarm_test.expected/Test-Ubuntu-GCC-GCE-CPU-AVX2-x86-Debug.json
index b9fa4ab..2cd24f5 100644
--- a/infra/bots/recipes/swarm_test.expected/Test-Ubuntu-GCC-GCE-CPU-AVX2-x86-Debug.json
+++ b/infra/bots/recipes/swarm_test.expected/Test-Ubuntu-GCC-GCE-CPU-AVX2-x86-Debug.json
@@ -360,6 +360,10 @@
       "serialize-8888",
       "gm",
       "_",
+      "typefacerendering_pfaMac",
+      "serialize-8888",
+      "gm",
+      "_",
       "bleed_alpha_image",
       "serialize-8888",
       "gm",