* gdb.t06/break.exp: Remove setup_xfails for
sparc-sun-solaris2.*, these tests now pass with latest gcc and gdb.
* gdb.t20/inherit.exp (test_ptype_si): Update warning message
about known bug in gcc to include up through 2.5.8.
* gdb.t20/inherit.exp (test_ptype_vi): Accept "_vb." as well as
well as "_vb$".
* gdb.t21/cplusfuncs.exp (test_lookup_operator_functions):
Remove setup_xfails for sparc-sun-solaris2.*, these tests no pass
with latest gcc and gdb.
* gdb.t22/virtfunc.exp (test_ptype_of_classes): Accept "_vb." as
well as "_vb$".