[PATCH] AMD GCN Port

[Andrew Stubbs]

Here's an updated patch that adds a stub implementation for "signal". 
This was requested during GCC patch review but accidentally omitted from 
the original Newlib patch as posted.

Note that the GCC port is now approved, and will be committed once I've 
completed final testing. (The first round of which demonstrated that 
"signal" was missing -- oops!)

As before, I've omitted config.sub and the generated files.

Is this version OK?

Andrew
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