c++: ICE with variable template and [[deprecated]] [PR110031]

c++: ICE with variable template and [[deprecated]] [PR110031]

lookup_and_finish_template_variable already has and uses the complain
parameter but it is not passing it down to mark_used so we got the
default tf_warning_or_error, which causes various problems when
lookup_and_finish_template_variable gets called with complain=tf_none.

	PR c++/110031

gcc/cp/ChangeLog:

	* pt.cc (lookup_and_finish_template_variable): Pass complain to
	mark_used.

gcc/testsuite/ChangeLog:

	* g++.dg/cpp1z/inline-var11.C: New test.