[PATCH] [MSP430] [PR80993] Prevent lto removing interrupt handlers

[Nick Clifton]

Hi Jozef,

> As reported in PR80993, enabling lto causes interrupt handlers to be
> removed. This patch marks interrupt handlers as used, preventing them
> from being optimized out.
> 
> If the attached patch is acceptable, I would appreciate if someone could
> commit it for me, as I do not have write access.

Approved and applied.  Thanks for fixing this bug.

Cheers
  Nick