* lib/gdb.exp (GDBFLAGS): Move -nx ...

	* lib/gdb.exp (GDBFLAGS): Move -nx ...
	(INTERNAL_GDBFLAGS): ... to here.  Move -nw to here as well.
	(default_gdb_version): Add $INTERNAL_GDBFLAGS to gdb invocations.
	(default_gdb_start,default_gdb_exit): Ditto.
	* lib/mi-support.exp (default_mi_gdb_start): Ditto.
	(mi_uncatched_gdb_exit): Add $INTERNAL_GDBFLAGS to log message.
	* gdb.base/corefile.exp: Add $INTERNAL_GDBFLAGS to gdb invocations.
	* gdb.base/dbx.exp (dbx_gdb_start): Ditto.
	* gdb.base/args.exp (GDBFLAGS): Don't overwrite, append.
	* gdb.base/remotetimeout.exp (GDBFLAGS): Ditto.