In BUILD.public, enable SK_SUPPORT_LEGACY_HAIR_IGNORES_CAPS.

Somehow https://codereview.chromium.org/1491843006 causes fills to change in one test.

BUG=skia:

Review URL: https://codereview.chromium.org/1516863007
diff --git a/BUILD.public b/BUILD.public
index d20eb23..2bead79 100644
--- a/BUILD.public
+++ b/BUILD.public
@@ -385,6 +385,8 @@
 ]
 
 DEFINES_ALL = [
+    # https://codereview.chromium.org/1491843006 somehow breaks fills.
+    "SK_SUPPORT_LEGACY_HAIR_IGNORES_CAPS",
     # Chrome DEFINES.
     "SK_USE_FLOATBITS",
     "SK_USE_FREETYPE_EMBOLDEN",