Fix PR c++/47291

gcc/
	PR c++/47291
	* dwarf2out.c (generic_type_p, schedule_generic_params_dies_gen)
	(gen_scheduled_generic_parms_dies): New functions.
	(gen_struct_or_union_type_die): Schedule template parameters DIEs
	generation for the end of CU compilation.
	(dwarf2out_finish): Generate template parameters DIEs here.

gcc/testsuite/

	PR c++/47291
	* g++.dg/debug/dwarf2/template-params-10.C: New test.

From-SVN: r169036