Sync dwarf headers with master versions in gcc repository.

Sync dwarf headers with master versions in gcc repository.

	* dwarf2.def: Sync with mainline gcc sources
	* dwarf2.h: Likewise.

	2016-12-21  Jakub Jelinek  <jakub@redhat.com>

	* dwarf2.def (DW_FORM_ref_sup): Renamed to ...
	(DW_FORM_ref_sup4): ... this.  New form.
	(DW_FORM_ref_sup8): New form.

	2016-10-17  Jakub Jelinek  <jakub@redhat.com>

	* dwarf2.h (enum dwarf_calling_convention): Add new DWARF5
	calling convention codes.
	(enum dwarf_line_number_content_type): New.
	(enum dwarf_location_list_entry_type): Add DWARF5 DW_LLE_*
	codes.
	(enum dwarf_source_language): Add new DWARF5 DW_LANG_* codes.
	(enum dwarf_macro_record_type): Add DWARF5 DW_MACRO_* codes.
	(enum dwarf_name_index_attribute): New.
	(enum dwarf_range_list_entry): New.
	(enum dwarf_unit_type): New.
	* dwarf2.def: Add new DWARF5 DW_TAG_*, DW_FORM_*, DW_AT_*,
	DW_OP_* and DW_ATE_* entries.

	2016-08-15  Jakub Jelinek  <jakub@redhat.com>

	* dwarf2.def (DW_AT_string_length_bit_size,
	DW_AT_string_length_byte_size): New attributes.

	2016-08-12  Alexandre Oliva <aoliva@redhat.com>

	PR debug/63240
	* dwarf2.def (DW_AT_deleted, DW_AT_defaulted): New.
	* dwarf2.h (enum dwarf_defaulted_attribute): New.