* gdb.t13/{Makefile.in,gdbme.c,bitfields.exp}: If we #defined the

	* gdb.t13/{Makefile.in,gdbme.c,bitfields.exp}: If we #defined the
	signed keyword away, don't expect signed bitfields to be signed.

	* gdb.t13/bitfields.exp (bitfield containment): Accept the fields
	printing with only as many 1's as are in the field as well as printing
	with 32 1's (see comment).