[BUG]: Clang <= 3.3 execution support is broken

### Describe the bug

```
/..//bin/ld: cannot find crtbegin.o: No such file or directory
/..//bin/ld: cannot find -lstdc++
clang: error: linker command failed with exit code 1 (use -v to see invocation)
```
Looks like some paths are broken.

### Steps to reproduce

- int main(){}
- Create an executor, or enable execution on a normal compiler panel
- Set compiler to Clang 3.3, or switch to C and try to use Clang <= 3.2

### Expected behavior

Fix em, disable em, or both

### Reproduction link

https://godbolt.org/z/hK75fqPWe (C++) / https://godbolt.org/z/8j3jz7h3z (C)

### Screenshots

Not applicable

### Operating System

_No response_

### Browser version

_No response_