SkPDF: record milestone version in Producer string

tests/PDFMetadataAttributeTest.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkDocument.h"
 #include "SkStream.h"
 #include "SkData.h"
 #include "Test.h"
@@ skipping 16 matching lines @@
     doc->setMetadata(&info[0], infoCount, &now, &now);
     doc->beginPage(612.0f, 792.0f);
     doc->close();
     SkAutoTUnref<SkData> data(pdf.copyToData());
     static const char* expectations[] = {
         "/Title (A1)",
         "/Author (A2)",
         "/Subject (A3)",
         "/Keywords (A4)",
         "/Creator (A5)",
-        "/Producer (Skia/PDF)",
+        "/Producer (Skia/PDF ",
         "/CreationDate (D:",
         "/ModDate (D:"
     };
     for (const char* expectation : expectations) {
         bool found = false;
         size_t N = 1 + data->size() - strlen(expectation);
         for (size_t i = 0; i < N; ++i) {
             if (0 == memcmp(data->bytes() + i,
                              expectation, strlen(expectation))) {
                 found = true;
                 break;
             }
         }
         if (!found) {
             ERRORF(r, "expectation missing: '%s'.", expectation);
         }
     }
 }