* dwarf2read.c (dwarf2_build_psymtabs_hard): Move lowpc and highpc

	* dwarf2read.c (dwarf2_build_psymtabs_hard): Move lowpc and highpc
	inside the loop.  Only call addrmap_set_empty if the compilation unit
	had DW_AT_high_pc and DW_AT_low_pc.  Update call to
	scan_partial_symbols.
	(scan_partial_symbols): Take NEED_PC argument and pass it along with
	LOWPC and HIGHPC.
	(add_partial_namespace): Take NEED_PC argument and pass it through.
	(add_partial_subprogram): Take NEED_PC argument.  Update the addrmap
	if necessary.