Webassembly Support

Was just exploring this project for webassembly (WASM), did not find the output too helpful. Adding the binary and output here for reference.

```
95.9% 470Ki NAN% 0 Code
3.5% 17.3Ki NAN% 0 Data
0.3% 1.38Ki NAN% 0 Import
0.1% 584 NAN% 0 Type
0.1% 552 NAN% 0 Function
0.0% 171 NAN% 0 Element
0.0% 24 NAN% 0 Global
0.0% 11 NAN% 0 Export
0.0% 8 NAN% 0 [WASM Header]
0.0% 7 NAN% 0 Table
0.0% 5 NAN% 0 Memory
100.0% 490Ki 100.0% 0 TOTAL
```

[eosio.evm.wasm.zip](https://github.com/google/bloaty/files/4405625/eosio.evm.wasm.zip)