disable packed texture tests on TSAN bot

https://build.chromium.org/p/client.skia/builders/Test-Ubuntu-Clang-Golo-GPU-GT610-x86_64-Release-TSAN
is flaky.

BUG=skia:

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=3662

Change-Id: I5c80970cb81db71f4acc89dc287952b1d2a3656c
Reviewed-on: https://skia-review.googlesource.com/3662
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Mike Klein <mtklein@chromium.org>

infra/bots/recipes/swarm_test.expected/Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-TSAN.json

@@ -336,7 +336,9 @@
       "_",
       "gamut",
       "--match",
-      "~ReadWriteAlpha"
+      "~ReadWriteAlpha",
+      "~RGBA4444TextureTest",
+      "~RGB565TextureTest"
     ],
     "cwd": "[SLAVE_BUILD]/skia",
     "env": {

infra/bots/recipes/swarm_test.py

@@ -350,6 +350,8 @@ def dm_flags(bot):
 
   if 'TSAN' in bot:
     match.extend(['~ReadWriteAlpha'])   # Flaky on TSAN-covered on nvidia bots.
+    match.extend(['~RGBA4444TextureTest',  # Flakier than they are important.
+                  '~RGB565TextureTest'])
 
   if 'Vulkan' in bot and 'Adreno' in bot:
     # skia:5777