gdb/testsuite/

	* Makefile.in (ALL_SUBDIRS): Add gdb.gdbserver.
	* configure.ac: Create gdb.gdbserver/Makefile.
	* configure: Regenerated.
	* lib/gdbserver-support.exp: New file, derived from
	config/gdbserver.exp.
	* config/gdbserver.exp: Use gdbserver-support.exp.
	* gdb.gdbserver/Makefile.in: New file.
	* gdb.gdbserver/server.c: New file.
	* gdb.gdbserver/server-run.exp: New file.
gdb/
	* config/fnchange.lst: Add testsuite/gdb.gdbserver entries.