Add new BSS_PLT variable for when .plt need not be contained in
the file. Move _etext so that it is also after .fini, and provide
both etext and _etext with a leading underscore. Mark the start
and end of .sbss.
being .rel.sdata, .rel.sdata.*, .rel.gnu.linkonce.s*.
(.rela.sdata): Likewise for .rela.sdata.* and .rela.gnu.linkonce.s*.
(.rel.sbss): Make like .rel.bss.
(.rela.sbss): Make like .rel.bss.
(.sdata): Don't include .gnu.linkonce.s.* or .sdata.* when
ld -r.
(.sbss): Do the same things as for .bss: include SDATA_START_SYMBOLS,
.dynsbss.
unwinders so that they are closer to the text section.
(OTHER_BSS_SECTIONS): Define.
(EXECUTABLE_SYMBOLS): Provide __SYSTEM_ID and _FPU_STATUS.
(INIT_START, INIT_END): Define.
(FINI_START, FINI_END): Define.
* scripttempl/elf.sc: Add support for INIT_START, INIT_END,
FINI_START, FINI_END and OTHER_BSS_SECTIONS.
* 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
