[wasm] Accept version 0x1 binaries.

src/wasm/module-decoder.cc

Index: src/wasm/module-decoder.cc
diff --git a/src/wasm/module-decoder.cc b/src/wasm/module-decoder.cc
index 829e5d4acadf5a9610c0fadfacb1e071cb60a304..a0ee912174676bda6c8dea93788ef5ab1af2d048 100644
--- a/src/wasm/module-decoder.cc
+++ b/src/wasm/module-decoder.cc
@@ -238,7 +238,8 @@ class ModuleDecoder : public Decoder {
     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",