integrated-terminal (x86_64-unknown-linux-gnu)

Came from https://github.com/Microsoft/vscode/issues/62532

VS Code under flatpack is not workable for complex projects, while with a separate installation everything is fine.

In the OS terminal:
```
art@artPC:/$ ls /usr/bin/../lib/gcc/
avr i686-linux-gnu x86_64-linux-gnu

```
In the VSCode integrated under flatpack:
```

sh-4.4$ ls /usr/bin/../lib/gcc/
x86_64-unknown-linux-gnu

```
There is only one object (really 3) and it has different name - `x86_64-unknown-linux-gnu` instead correct `x86_64-linux-gnu`. As result - cannot to build library.