Disable rust incremental build on WSL2
I got an error like `error: incremental compilation: could not create session directory lock file: Incorrect function. (os error 1)` on WSL2 console when I tried to build a rust program. It seems incremental build is not working well on WSL2 yet. https://github.com/rust-lang/rust/issues/49773
I made a small script to pass an env variable to cargo.exe like below.
```
#!/bin/bash export CARGO_INCREMENTAL=0 WSLENV=$WSLENV:CARGO_INCREMENTAL/w cargo.exe $@
```
It works well for me. And a reference about passing environment variable between WSL ubuntu and windows is https://devblogs.microsoft.com/commandline/share-environment-vars-between-wsl-and-windows/
















