[PATCH 0/3] Send some output to gdb_stderr

[Tom Tromey]

PR gdb/7233 notes that some gdb output goes to the wrong stream.
While this is a never-ending battle, and so I think the bug can be
closed any time, in the meantime I found a few spots that were easy to
fix up.

This short series redirects some output to gdb_stderr, where
appropriate.

Regression tested on x86-64 Fedora 34.  (Though of course I wouldn't
expect to see any problems due to how the test suite works.)

Tom