Remove long-running sk_linear_to_srgb test for ASAN in public.bzl.

This unit test takes >~5m and causes the ASAN test to time out.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2175303002

Review-Url: https://codereview.chromium.org/2175303002
diff --git a/public.bzl b/public.bzl
index 73a217e..eb0909f 100644
--- a/public.bzl
+++ b/public.bzl
@@ -518,6 +518,7 @@
         "~PathOpsSimplify",
         "~PathOpsTightBoundsQuads",
         "~Point",
+        "~sk_linear_to_srgb",
     ]
   return [
       "--src %s" % " ".join(source),