[PATCH 06/11] Handle enums for CodeView

[PATCH 06/11] Handle enums for CodeView

Translates DW_TAG_enumeration_type DIEs into LF_ENUM symbols.

gcc/
	* dwarf2codeview.cc (MAX_FIELDLIST_SIZE): Define.
	(struct codeview_integer): New structure.
	(struct codeview_subtype): Likewise
	(struct codeview_custom_type): Add lf_fieldlist and lf_enum to union.
	(write_cv_integer, cv_integer_len): New functions.
	(write_lf_fieldlist, write_lf_enum): Likewise.
	(write_custom_types): Call write_lf_fieldlist and write_lf_enum.
	(add_enum_forward_def): New function.
	(get_type_num_enumeration_type): Likewise.
	(get_type_num): Handle DW_TAG_enumeration_type DIEs.
	* dwarf2codeview.h (LF_FIELDLIST, LF_INDEX, LF_ENUMERATE): Define.
	(LF_ENUM, LF_CHAR, LF_SHORT, LF_USHORT, LF_LONG): Likewise.
	(LF_ULONG, LF_QUADWORD, LF_UQUADWORD): Likewise.
	(CV_ACCESS_PRIVATE, CV_ACCESS_PROTECTED): Likewise.
	(CV_ACCESS_PUBLIC, CV_PROP_FWDREF): Likewise.