bfd_asymbol_* macros

bfd_asymbol_* macros

The main point of this patch is to give bfd_get_section a better name,
bfd_asymbol_section.

bfd/
	* bfd-in.h (bfd_asymbol_section): Rename from bfd_get_section.
	(bfd_get_output_section): Delete.
	(bfd_asymbol_base): Delete.
	(bfd_asymbol_section, bfd_asymbol_value, bfd_asymbol_name),
	(bfd_asymbol_bfd, bfd_asymbol_flavour): Tidy.
	(bfd_set_asymbol_name): New macro.
	* bfd-in2.h: Regenerate.
	* aout-cris.c: Update throughout to use bfd_asymbol_section.
	* aoutx.h: Likewise.
	* cofflink.c: Likewise.
	* dwarf2.c: Likewise.
	* ecoff.c: Likewise.
	* elf.c: Likewise.
	* elf32-arm.c: Likewise.
	* elf32-mips.c: Likewise.
	* elf32-score.c: Likewise.
	* elf32-score7.c: Likewise.
	* elfn32-mips.c: Likewise.
	* elfnn-aarch64.c: Likewise.
	* elfxx-mips.c: Likewise.
	* linker.c: Likewise.
	* pdp11.c: Likewise.
	* elf64-mmix.c (mmix_elf_reloc): Expand bfd_get_output_section.
binutils/
	* nm.c: Update bfd_get_section to bfd_asymbol_section throughout.
	* objcopy.c: Likewise.
	* objdump.c: Likewise.
	* rdcoff.c: Likewise.
	* objcopy.c (create_new_symbol): Use bfd_set_asymbol_name.
	(filter_symbols): Likewise.
gas/
	* symbols.c (S_IS_LOCAL): Update bfd_get_section to
	bfd_asymbol_section.
gdb/
	* arm-tdep.c (arm_record_special_symbol): Update bfd_get_section
	to bfd_asymbol_section.
ld/
	* ldcref.c (check_reloc_refs): Update bfd_get_section to
	bfd_asymbol_section.