[wasm] Accept version 0x1 binaries.

src/wasm/module-decoder.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/wasm/module-decoder.h"
 
 #include "src/base/functional.h"
 #include "src/base/platform/platform.h"
 #include "src/flags.h"
 #include "src/macro-assembler.h"
@@ skipping 220 matching lines @@
     if (magic_word != kWasmMagic) {
       error(pos, pos,
             "expected magic word %02x %02x %02x %02x, "
             "found %02x %02x %02x %02x",
             BYTES(kWasmMagic), BYTES(magic_word));
     }
 
     pos = pc_;
     {
       uint32_t magic_version = consume_u32("wasm version");
-      if (magic_version != kWasmVersion) {
+      if (magic_version != kWasmVersion &&
+          magic_version != kWasmLegacyVersion) {
         error(pos, pos,
               "expected version %02x %02x %02x %02x, "
               "found %02x %02x %02x %02x",
               BYTES(kWasmVersion), BYTES(magic_version));
       }
     }
 
     WasmSectionIterator section_iter(*this);
 
     // ===== Type section ====================================================
@@ skipping 1044 matching lines @@
     result.push_back({section_start, name_offset, name_length, payload_offset,
                       payload_length, section_length});
   }
 
   return result;
 }
 
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8