Annotate SkPath::fCovexity benign race in the other constructor too.

I overlooked the copy constructor last time.

BUG=skia:5776

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4730

Change-Id: I30bc89e1472dd48badf57664cfae8899f44bca9e
Reviewed-on: https://skia-review.googlesource.com/4730
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Mike Klein <mtklein@chromium.org>

src/core/SkPath.cpp

@@ -148,6 +148,8 @@ SkPath::SkPath(const SkPath& that)
     : fPathRef(SkRef(that.fPathRef.get())) {
     this->copyFields(that);
     SkDEBUGCODE(that.validate();)
+    AnnotateBenignRaceSized(__FILE__, __LINE__, &fConvexity, sizeof(fConvexity),
+                            "We've tried a few times to make this thread safe, and failed.");
 }
 
 SkPath::~SkPath() {