Roll sfntly to 54 to address root cause of 92270. Fix leak in our usage of sfntly.

third_party/sfntly/src/subsetter/subsetter_impl.cc

 /*
  * Copyright 2011 Google Inc. All Rights Reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
@@ skipping 155 matching lines @@
       case NameId::kPreferredFamily:
       case NameId::kPreferredSubfamily:
       case NameId::kWWSFamilyName:
       case NameId::kWWSSubfamilyName: {
         int32_t hash_code = HashCode(name_table->PlatformId(i),
                                      name_table->EncodingId(i),
                                      name_table->LanguageId(i),
                                      name_table->NameId(i));
         UChar* name_part = name_table->Name(i);
         ConstructName(name_part, &(names[hash_code]), name_table->NameId(i));
+        delete[] name_part;
         break;
       }
       default:
         break;
     }
   }
 
   if (!names.empty()) {
     for (NameMap::iterator b = names.begin(), e = names.end(); b != e; ++b) {
       if (b->second.caseCompare(font_string, 0) == 0 ||
@@ skipping 145 matching lines @@
       TableBuilderPtr dereference;
       dereference.Attach(
           font_builder->NewTableBuilder(i->first, i->second->ReadFontData()));
     }
   }
 
   return font_builder->Build();
 }
 
 }  // namespace sfntly