This adds mspdebug as package, similar to EDBG, so that the
programmer/debugger is build from source.
This has the advantage that we can indeed provide patches of our own.
The first patch fixes a bug with the CPU detection of `mspdebug` in
combination with the Olimex MSP430-JTAG-TINY-V2. The second adds the
`--expect-id <CPU_NAME>` argument.
The RIOT integration is updated to directly make use of the
`--expect-id` parameter. No more spending time debugging why firmware
the firmware for the `olimex-msp430-h2618` doesn't run when flashed on
the `olimex-msp430h1611` hardware :D
The semantics of `make debug` and `make debugserver` have changed in
the years since the MSP430 integration. This brings the implementation
back into line with the current semantics
- `make debug` now starts both mspdebug and GDB, no need to
run `make debugserver` prior to `make debug` anymore
- `make debug` no longer flashes the target to not waste flash erase
cycles
- GDB mutliarch support is added
- support for selecting a debug adapter by its serial is added
