[RFA] Ignore data minimal symbols for breakpoint linespecs

[Joel Brobecker]

> Give that the target in question is 64-bit PowerPC, my bet is that by
> discarding data minimal symbols, you're also discarding function
> descriptors.  That's probably not a good idea.

Thanks for the tip, Mark. After having looked at the logs, I think
you are right on the money. What do you think of the attached patch?

Edjunior, can you test it for me?

Thanks,
-- 
Joel
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