Rename testsuite/boards/local-remote-host.exp -> testsuite/boards/local-remote-host...

Rename testsuite/boards/local-remote-host.exp -> testsuite/boards/local-remote-host-notty.exp

When testing with this board, stdin is not a tty, and so
readline/editing is disabled:

 $ ssh localhost gdb -q
 (gdb) show editing
 Editing of command lines as they are typed is off.
 (gdb)

Rename the file, to make room for a version of this board that forces a pseudo-tty.

gdb/testsuite/
2014-05-01  Pedro Alves  <palves@redhat.com>

	* boards/local-remote-host.exp: Rename to ...
	* boards/local-remote-host-notty.exp: ... this.