Better support for Ada renamings in "info locals" output

[Joel Brobecker]

Hello,

The meat of this patch series is in the first patch, but I needed an
unrelated patch to go in at the same time (patch #2). And patch #3 is
the testcase, once patch #1 is in.

Note: Patch #2, being independent, has been checked in on its own.

Thanks,
-- 
Joel