Updated Ada Hardware Interrupt Patch

[Arnaud Charlet]

> I updated the PR with the patch on the same day you
> posted this to include the missing file. The ChangeLog
> was incorrect and there were no changes to s-osinte-rtems.adb.
> I thought you got email from the changes to the Ada PRs but
> since you haven't replied... ping...

Well, I was expecting a patch submission update on gcc-patches rather
than a change in bugzilla, so I switched to other tasks in the meantime.

Arno