[RFA 7/8] Use unique_xmalloc_ptr in execute_gdb_command

[Tom Tromey]

>>>>> "Pedro" == Pedro Alves <palves@redhat.com> writes:

Pedro> In some other local patch that I hadn't posted, I handled a similar
Pedro> situation of save/restoring some global that we don't want to expose
Pedro> by making the "make_cleanup_..." function return a scoped_restore, which
Pedro> avoids having to create a new class.  It seems a bit simpler that
Pedro> creating a class to me, and maybe a tiny bit more efficient code-space
Pedro> wise (rtti?)  Did you consider this approach?

I didn't, but I like it, so I'll make this change.

Tom