c++: TTP in member alias template [PR104107]

c++: TTP in member alias template [PR104107]

In the first testcase, coerce_template_template_parms was adding too much of
outer_args when coercing to match P's template parameters, so that when
substituting into the 'const T&' parameter we got an unrelated template
argument for T.  We should only add outer_args when the argument template is
a nested template.

	PR c++/104107
	PR c++/95036

gcc/cp/ChangeLog:

	* pt.cc (coerce_template_template_parms): Take full parms.
	Avoid adding too much of outer_args.
	(coerce_template_template_parm): Adjust.
	(template_template_parm_bindings_ok_p): Adjust.
	(convert_template_argument): Adjust.

gcc/testsuite/ChangeLog:

	* g++.dg/cpp0x/alias-decl-ttp2.C: New test.
	* g++.dg/cpp1z/ttp2.C: New test.