Add fuzz executable to GN

fuzz/FuzzParsePath.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Fuzz.h"
 #include "SkString.h"
 #include "SkParsePath.h"
 #include <stdlib.h>
 
 // Most of this is taken from random_parse_path.cpp and adapted to use the Fuzz
 // instead of SKRandom
 
-const struct Legal {
+static const struct Legal {
     char fSymbol;
     int fScalars;
 } gLegal[] = {
     { 'M', 2 },
     { 'H', 1 },
     { 'V', 1 },
     { 'L', 2 },
     { 'Q', 4 },
     { 'T', 2 },
     { 'C', 6 },
     { 'S', 4 },
     { 'A', 4 },
     { 'Z', 0 },
 };
 
-bool gEasy = false;  // set to true while debugging to suppress unusual whitespace
+static bool gEasy = false;  // set to true while debugging to suppress unusual whitespace
 
 // mostly do nothing, then bias towards spaces
-const char gWhiteSpace[] = { 0, 0, 0, 0, 0, 0, 0, 0, ' ', ' ', ' ', ' ', 0x09, 0x0D, 0x0A };
+static const char gWhiteSpace[] = { 0, 0, 0, 0, 0, 0, 0, 0, ' ', ' ', ' ', ' ', 0x09, 0x0D, 0x0A };
 
 static void add_white(Fuzz* fuzz, SkString* atom) {
     if (gEasy) {
         atom->append(" ");
         return;
     }
     int reps = fuzz->nextRangeU(0, 2);
     for (int rep = 0; rep < reps; ++rep) {
         int index = fuzz->nextRangeU(0, (int) SK_ARRAY_COUNT(gWhiteSpace) - 1);
         if (gWhiteSpace[index]) {
@@ skipping 60 matching lines @@
     SkString spec;
     uint32_t count = fuzz->nextRangeU(0, 40);
     for (uint32_t i = 0; i < count; ++i) {
         spec.append(MakeRandomParsePathPiece(fuzz));
     }
     SkDebugf("SkParsePath::FromSVGString(%s, &path);\n",spec.c_str());
     if (!SkParsePath::FromSVGString(spec.c_str(), &path)){
         fuzz->signalBug();
     }
 }