First part of list file support. This should accurately output all file

First part of list file support.  This should accurately output all file
bytes and offsets, but relocations are not yet indicated.  Also, this
outputs post-preprocessed source, so no comments, etc, are visible in the
list file.

* listfmt.h: New header file describing listfmt module interface.
* coretype.h: Declare new yasm_listfmt typedef.
* libyasm.h: Include listfmt.h.
* libyasm/Makefile.inc (modinclude_HEADERS): Add listfmt.h.

* yasm-module.h (module_type): Add MODULE_LISTFMT for listfmts.
(load_listfmt_module, list_listfmts): New macros for listfmts.
* yasm-module.c (module_type_str): Add listfmt string for MODULE_LISTFMT.
(list_module_load): Add support for MODULE_LISTFMT.

* bytecode.h (yasm_bc_tobytes): Comment clarification on effect of calling
yasm_bc_tobytes twice on the same bytecode.

* linemgr.h: Replace support for associated data with support for bytecode
and source line information.
(yasm_linemap_get_data): Remove.
(yasm_linemap_get_source): Add.
(yasm_linemap_add_data): Remove.
(yasm_linemap_add_source): Add.
* linemgr.c (yasm_linemap, yasm_linemap_create, yasm_linemap_destroy)
(yasm_linemap_add_data, yasm_linemap_add_source, yasm_linemap_get_data)
(yasm_linemap_get_source): Likewise.

* nasm-token.re (fill): Save previous 2 lines instead of previous 1 line.
(destroy_line, print_line, line_assoc_data): Remove.
(save_line): Save line in structure instead of calling yasm_linemap_add_data.
* nasm-bison.y (input rule): Call yasm_linemap_add_source here.
* nasm-parser.h (yasm_parser_nasm): Add second line of storage and save_last
variable to toggle between the two lines.
* nasm-parser.c (nasm_parser_do_parse): Initialize save_last.

* modules/Makefile.inc: Include new modules/listfmts/Makefile.inc.
* modules/listfmts/Makefile.inc: New;
includes modules/listfmts/nasm/Makefile.inc.
* modules/listfmts/nasm/Makefile.inc: New build file for NASM-like listfmt.
* nasm-listfmt.c: New NASM-like listfmt.

* yasm.c: Enable use of listfmts, and default to NASM listfmt.
(list_filename, cur_listfmt, cur_listfmt_module): New listfmt variables.
(opt_listfmt_handler, opt_listfile_handler): New listfmt functions.
(options): Add --lformat (-L) and --list (-l) options.
(main): Load "nasm" listfmt as default if none selected.
Enable saving of input lines if list output file enabled.
Open and write to the list file.
(open_obj): Rename to open_file and make more generic.
(cleanup): Destroy listfmt and list filename if created.

svn path=/trunk/yasm/; revision=1152