Prevent attempts to allocate excessive amounts of memory when parsing corrupt ELF...

Prevent attempts to allocate excessive amounts of memory when parsing corrupt ELF files.

	PR 24708
	* elf.c (_bfd_elf_slurp_version_tables): Check for an excessively
	large version reference section.
	* compress.c (bfd_get_full_section_contents): Check for an
	uncompressed section whose size is larger than the file size.