After upgrade to 14.04 from 12.04 clang++ stopped working.

```
$ cat test.cpp 
#include <iostream>

int main()
{
        std::cout << "Hello World" << std::endl;
        return 0;
}

$ clang++ test.cpp 
test.cpp:1:10: fatal error: 'iostream' file not found
#include <iostream>
         ^
1 error generated

```

Installed with `apt-get install clag-3.5` same happened with clang-3.4

Thanks