gdb/doc/

gdb/doc/
	* gdbint.texinfo (Testsuite): Describe KFAIL and XFAIL in Writing
	tests.

gdb/testsuite/
	* gdb.cp/ptype-cv-cp.exp (ptype v_volatile_const_my_int): Replace KFAIL
	by XFAIL.
	* gdb.cp/static-method.exp (info addr A::func())
	(list static-method.cc:xxx::(anonymous namespace)::A::func)
	(list 'static-method.cc:xxx::(anonymous namespace)::A::func')
	(list 'static-method.cc':'xxx::(anonymous namespace)::A::func')
	(list static-method.cc:'xxx::(anonymous namespace)::A::func'): Likewise.
	* gdb.cp/temargs.exp (test value of F in k2_m, test type of F in k3_m)
	(test value of F in k3_m): Likewise.
	* gdb.python/py-type.exp (python print ttype.template_argument(2)):
	Likewise.