* gdb.t02/whatis.exp, gdb.t03/ptype.exp, gdb.t08/opaque.exp,

	* gdb.t02/whatis.exp, gdb.t03/ptype.exp, gdb.t08/opaque.exp,
	gdb.t09/corefile.exp:  Cleanup xfails for fixed mips bugs.
	* gdb.t13/bitfields.exp, gdbme.c:  Examine a variable in the inferior
	to determine signed-ness of bitfields and use the result to setup
	the xfail.
	* gdb.t13/gdbme.c:  Add comment to the two indirect call0a lines.
	* gdb.t13/funcargs.exp:  Use it to step until the second indirect call
	line is reached if necessary.