fragmented .debug_line sections associated with unmarked code
sections.
* dwarf.c (read_debug_line_header): New function. Reads in a
header in a .debug_line section.
(display_debug_lines_raw): Use new function. Handle fragmentary
.debug_line sections.
(display_debug_lines_decoded): Likewise.
* readelf.c (process_section_headers): Handle fragmenatry
.debug_line sections.
(display_debug_section): Likewise.
* as.c (Options): Add -gdwarf-sections.
(parse_args): Likewise.
* as.h (flag_dwarf_sections): Declare.
* dwarf2dbg.c (emit_fixed_inc_line_addr): Skip section changes.
(process_entries): When -gdwarf-sections is enabled generate
fragmentary .debug_line sections.
(out_debug_line): Set the section for the .debug_line section end
symbol.
* doc/as.texinfo: Document -gdwarf-sections.
* NEWS: Mention -gdwarf-sections.
* gas/elf/dwarf2-3.d: Fix expected readelf output.
* scripttempl/DWARF.sc: Add support for .debug_line.* and
.debug_line_end.