Use retarged version (nosys.specs) for Mbed OS. To resolve an issue with debug/develop profiles.
Otherwise we get kill or getpid errors from linker, as we use nosys lib but no specs defined.
This module was doing things that mbed-os and the application were supposed to do.
Moved the statements form the module to `mbed-os/CMakeLists.txt` and to
`<APPLICATION_ROOT>/CMakeLists.txt` .
Mbed OS also ensures the executable produced uses whatever name the application has set.