dwarf2out.c (output_compilation_unit_header): For -gdwarf-4 use version 4 instead...

dwarf2out.c (output_compilation_unit_header): For -gdwarf-4 use version 4 instead of version 3.

	* dwarf2out.c (output_compilation_unit_header): For
	-gdwarf-4 use version 4 instead of version 3.
	(output_line_info): For version 4 and above emit additional
	maximum ops per insn header field.
	(DWARF_LINE_DEFAULT_MAX_OPS_PER_INSN): Define.

	* dwarf2out.c (is_c_family, is_java): Remove.
	(lower_bound_default): New function.
	(add_bound_info, gen_descr_array_type_die): Use it.

From-SVN: r157930