Get rid of SEC_ELF_RENAME

Get rid of SEC_ELF_RENAME

SEC_ELF_RENAME is a flag used to effect section name changes when
compressing/decompressing zlib-gnu debug sections.  This can be
accomplished more directly in one of the objcopy specific bfd
functions.  Renaming for ld input is simplified too.  Ld input object
files always have BFD_DECOMPRESS set.

bfd/
	* compress.c (bfd_convert_section_size): Rename to..
	(bfd_convert_section_setup): ..this.  Handle objcopy renaming
	of compressed/decompressed debug sections.
	* elf.c (_bfd_elf_make_section_from_shdr): Only rename zdebug
	input for linker.
	(elf_fake_sections): Don't handle renaming of debug sections for
	objcopy here.
	* section.c (SEC_ELF_RENAME): Delete.
	* bfd-in2.h: Regenerate.
binutils/
	* objcopy.c (setup_section): Call bfd_convert_section_setup.
	Don't call bfd_convert_section_size.