call portable font cleanup only once at app end

dm/DM.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "CrashHandler.h"
 #include "DMJsonWriter.h"
 #include "DMSrcSink.h"
@@ skipping 779 matching lines @@
             case kGPU_Enclave:
                 tg.add(run_enclave_and_gpu_tests, &enclaves[i]);
                 break;
             default:
                 tg.add(run_enclave, &enclaves[i]);
                 break;
         }
     }
     tg.wait();
     // At this point we're back in single-threaded land.
+    sk_tool_utils::release_portable_typefaces();
 
     SkDebugf("\n");
     if (gFailures.count() > 0) {
         SkDebugf("Failures:\n");
         for (int i = 0; i < gFailures.count(); i++) {
             SkDebugf("\t%s\n", gFailures[i].c_str());
         }
         SkDebugf("%d failures\n", gFailures.count());
         return 1;
     }
     if (gPending > 0) {
         SkDebugf("Hrm, we didn't seem to run everything we intended to!  Please file a bug.\n");
         return 1;
     }
     return 0;
 }
 
 #if !defined(SK_BUILD_FOR_IOS)
 int main(int argc, char** argv) {
     SkCommandLineFlags::Parse(argc, argv);
     return dm_main();
 }
 #endif