Add SK_SUPPORT_LEGACY_HAIRLINE_END_CAP to work around dependent test failure.

src/core/SkScan_Hairline.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkScan.h"
 #include "SkBlitter.h"
 #include "SkMathPriv.h"
@@ skipping 575 matching lines @@
                 if (SkPaint::kButt_Cap != capStyle && prevVerb == SkPath::kMove_Verb) {
                     // cap moveTo/close to match svg expectations for degenerate segments
                     extend_pts<capStyle>(prevVerb, iter.peek(), pts, 2);
                 }
                 lineproc(pts, 2, clip, blitter);
                 break;
             case SkPath::kDone_Verb:
                 break;
         }
         if (SkPaint::kButt_Cap != capStyle) {
+#if !defined(SK_SUPPORT_LEGACY_HAIRLINE_END_CAP)
             if (prevVerb == SkPath::kMove_Verb &&
                     verb >= SkPath::kLine_Verb && verb <= SkPath::kCubic_Verb) {
                 firstPt = pts[0];  // the curve moved the initial point, so close to it instead
             }
+#endif
             prevVerb = verb;
         }
     }
 }
 
 void SkScan::HairPath(const SkPath& path, const SkRasterClip& clip, SkBlitter* blitter) {
     hair_path<SkPaint::kButt_Cap>(path, clip, blitter, SkScan::HairLineRgn);
 }
 
 void SkScan::AntiHairPath(const SkPath& path, const SkRasterClip& clip, SkBlitter* blitter) {
@@ skipping 86 matching lines @@
 
         SkAAClipBlitterWrapper wrap;
         if (!clip.quickContains(r.roundOut().makeOutset(1, 1))) {
             wrap.init(clip, blitter);
             blitter = wrap.getBlitter();
             clipRgn = &wrap.getRgn();
         }
         AntiHairLineRgn(pts, count, clipRgn, blitter);
     }
 }