* dwarf2read.c (dwarf2_tmp_obstack, dwarf2_free_tmp_obstack):

	* dwarf2read.c (dwarf2_tmp_obstack, dwarf2_free_tmp_obstack):
	Delete.
	(dwarf_alloc_block): Take a CU argument.  Use the comp_unit_obstack.
	(read_attribute_value): Update calls to dwarf_alloc_block.
	(dwarf2_build_psymtabs_hard): Don't initialize or clean up
	dwarf2_tmp_obstack.
	(psymtab_to_symtab_1): Likewise.  Clean up using
	free_stack_comp_unit.
	(add_to_cu_func_list): Use the comp_unit_obstack.