workaround?

Bug: skia:9709
Change-Id: I83427229ebc6113cb6f037d9a0bce1453cdb8ecd
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/259978
Commit-Queue: Mike Klein <mtklein@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
Auto-Submit: Mike Klein <mtklein@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
diff --git a/BUILD.gn b/BUILD.gn
index 9f2546a..dd457c7 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -187,6 +187,9 @@
     cflags = [ "/arch:AVX" ]
   } else {
     cflags = [ "-mavx" ]
+    if (is_mac && is_debug) {
+      cflags += [ "-O1" ]  # Work around skia:9709
+    }
   }
 }