have not found wasm file

[suhanyujie]

• Hello~
• I have a problem. I have not get a "wasm" file when i run this: rustup target add wasm32-unknown-unknown and cargo build --target wasm32-unknown-unknown .The dir of target is like this:

target/wasm32-unknown-unknown/debug/
├── build
├── deps
│   ├── libwasmer_plugin_example-5c131292408204bf.rmeta
│   ├── libwasmer_plugin_example-b451bca680263c78.rlib
│   ├── wasmer_plugin_example-5c131292408204bf.d
│   └── wasmer_plugin_example-b451bca680263c78.d
├── examples
├── incremen

• My os is 18~18.04.1-Ubuntu
• rust version is rustc 1.34.0 (91856ed52 2019-04-10),cargo version is cargo 1.34.0 (6789d8a0a 2019-04-01)