Add miniz library to third_party, use it on Windows

tests/PDFPrimitivesTest.cpp

 /*
  * Copyright 2010 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 "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkData.h"
@@ skipping 277 matching lines @@
     }
     SkBitmap bitmap;
     setup_bitmap(&bitmap, 10, 10);
     TestImage(reporter, bitmap,
               "/Subtype /Image\n"
               "/Width 10\n"
               "/Height 10\n"
               "/ColorSpace /DeviceRGB\n"
               "/BitsPerComponent 8\n"
               "/Filter /FlateDecode\n"
-              "/Length 13\n"
-              ">> stream",
+              "/Length ",
               false);
 }
 
 static void TestDCTDecode(skiatest::Reporter* reporter) {
     SkBitmap bitmap;
     setup_bitmap(&bitmap, 32, 32);
     TestImage(reporter, bitmap,
               "/Subtype /Image\n"
               "/Width 32\n"
               "/Height 32\n"
@@ skipping 111 matching lines @@
     TestCatalog(reporter);
 
     TestObjectRef(reporter);
 
     TestSubstitute(reporter);
 
     test_issue1083();
 
     TestImages(reporter);
 }