Move elf32.em and elf-generic.em functions

Many ELF linker targets support multiple "emulations" and thus have
multiple copies of elf32.em being compiled and linked into ld.  This
patch moves much of elf32.em and elf-generic.em into files which will
be compiled just once, resulting in a 20% decrease in ld size for
--enable-targets=all.

	* Makefile.am (ALL_EMUL_EXTRA_OFILES): Add ldelf and ldelfgen.
	(CFILES, HFILES, EXTRA_ld_new_SOURCES): Likewise.
	* configure.tgt: Formatting.
	(targ_extra_ofiles): Init to ldelf.o ldelfgen.o, reset to just
	ldelfgen.o for generic ELF targets, and empty for non-ELF.
	* emultempl/aarch64elf.em (gldaarch64_layout_sections_again): Use
	ldelf_map_segments.
	(gld${EMULATION_NAME}_after_allocation): Likewise.
	(real_func, aarch64_for_each_input_file_wrapper),
	(aarch64_lang_for_each_input_file): Delete.
	(lang_for_each_input_file): Don't define.
	* emultempl/alphaelf.em (alpha_after_parse): Use ldelf_map_segments.
	* emultempl/armelf.em (gldarm_layout_sections_again): Likewise.
	(gld${EMULATION_NAME}_after_allocation): Likewise.
	(real_func, arm_for_each_input_file_wrapper),
	(arm_lang_for_each_input_file): Delete.
	(lang_for_each_input_file): Don't define.
	* emultempl/cr16elf.em (cr16elf_after_parse): Use ldelf_map_segments.
	* emultempl/crxelf.em (crxelf_after_parse): Likewise.  Delete
	declaration.
	* emultempl/cskyelf.em (gldcsky_layout_sections_again): Use
	ldelf_map_segments.
	(gld${EMULATION_NAME}_after_allocation): Likewise.
	(real_func, csky_for_each_input_file_wrapper),
	(csky_lang_for_each_input_file): Delete.
	(lang_for_each_input_file): Don't define.
	* emultempl/genelf.em: Include ldelfgen.h.
	(gld${EMULATION_NAME}_before_allocation): Use ldelf_map_segments.
	* emultempl/hppaelf.em (hppaelf_after_parse): Likewise.
	(hppaelf_layout_sections_again): Likewise.
	(gld${EMULATION_NAME}_after_allocation): Likewise.
	(real_func, hppa_for_each_input_file_wrapper),
	(hppa_lang_for_each_input_file): Delete.
	(lang_for_each_input_file): Don't define.
	* emultempl/ia64elf.em (ia64elf_after_parse): Use ldelf_map_segments.
	* emultempl/m68hc1xelf.em (real_func),
	(m68hc11_for_each_input_file_wrapper),
	(m68hc11_lang_for_each_input_file): Delete.
	(lang_for_each_input_file): Don't define.
	* emultempl/metagelf.em (metagelf_layout_sections_again): Use
	ldelf_map_segments.
	(gld${EMULATION_NAME}_after_allocation): Likewise.
	(real_func, metag_for_each_input_file_wrapper),
	(metag_lang_for_each_input_file): Delete.
	(lang_for_each_input_file): Don't define.
	* emultempl/mipself.em (real_func),
	(mips_for_each_input_file_wrapper),
	(mips_lang_for_each_input_file): Delete.
	(lang_for_each_input_file): Don't define.
	* emultempl/mmo.em: Don't include elf-bfd.h, do include ldelfgen.h.
	(gld${EMULATION_NAME}_after_allocation): Use ldelf_map_segments.
	* emultempl/nds32elf.em (nds32_elf_after_parse): Use ldelf_after_parse.
	(nds32_elf_after_allocation): Comment fix.
	* emultempl/nios2elf.em (nios2elf_layout_sections_again): Use
	ldelf_map_segments.
	(gld${EMULATION_NAME}_after_allocation): Likewise.
	(real_func, nios2_for_each_input_file_wrapper),
	(nios2_lang_for_each_input_file): Delete.
	(lang_for_each_input_file): Don't define.
	* emultempl/ppc32elf.em (gld${EMULATION_NAME}_load_symbols): Delete
	declaration.
	(ppc_recognized_file): Call ldelf_load_symbols.
	* emultempl/ppc64elf.em (ppc_layout_sections_again): Likewise.
	(gld${EMULATION_NAME}_after_allocation): Likewise.
	(real_func, ppc_for_each_input_file_wrapper),
	(ppc_lang_for_each_input_file): Delete.
	(lang_for_each_input_file): Don't define.
	(gld${EMULATION_NAME}_load_symbols): Don't declare.
	(ppc64_recognized_file): Call ldelf_load_symbols.
	* emultempl/riscvelf.em (gld${EMULATION_NAME}_after_allocation):
	Use ldelf_map_segments.
	* emultempl/spuelf.em (spu_place_special_section): Use
	ldelf_place_orphan.
	* emultempl/tic6xdsbt.em (gld${EMULATION_NAME}_after_allocation):
	Use ldelf_map_segments.
	* emultempl/vms.em: Include ldelfgen.h.
	(gld${EMULATION_NAME}_after_allocation): Use ldelf_map_segments.
	* emultempl/elf32.em: Remove unnecessary headers, include ldelf.h
	and ldelfgen.h.  Move much of file content to..
	* ldelf.c: ..here.  New file.
	* ldelf.h: New file.
	* emultempl/elf-generic.em: Move gld${EMULATION_NAME}_map_segments..
	* ldelfgen.c: ..to here.
	* ldelfgen.h: New file.
	* ldlang.c (lang_for_each_input_file): Adjust to only call func
	on real files.
	(lang_for_each_file): Likewise.
	* po/SRC-POTFILES.in: Regenerate.
	* Makefile.in: Regenerate.

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