* genscript.sh: Add support for generating a .xa script for use with the --auto-import option.
* ld.texinfo: Document the new behaviour of the --auto-import option.
* ldint.texinfo: Document new script generation.
* emulparams/i386pe.sh (GENERATE_AUTO_IMPORT): Define.
* emulparams/i386pe_posix.sh (GENERATE_AUTO_IMPORT): Define.
* emulparams/i386pep.sh (GENERATE_AUTO_IMPORT): Define.
* emultemp/pe.em (..._get_script): Support the use of the auto import script.
* scripttempl/pe.sc: Put the .rdata input sections into the .data output section when creating an auto import script.
* scripttempl/pep.sc: Likewise.
emulparams/i386pe_posix.sh, emulparams/mcorepe.sh, emulparams/mipspe.sh,
emulparams/ppcpe.sh, scripttempl/pe.sc: Define TARGET_PAGE_SIZE.
* scripttempl/pe.sc: Make the virtual address and file offset synced if the
alignment is lower than the target page size.
* scripttempl/pe.sc: Specify the output arch, which Ian says is
the Right Thing to do.
* emultempl/pe.em: various changes to parameterize the
target-specific information.
(gld_i386pe_after_open): Detect and fix MS import libraries
by renaming the member objects (which are all named the same).
* pe-dll.c: various changes to parameterize the target-specific
information.
(generate_reloc): support relocs more generically to allow for
expansion.
(pe_exe_build_sections): new; used to add .relocs to .exes
(pe_exe_fill_sections): ditto
