PR binutils/12855

	PR binutils/12855
	* readelf.c (process_version_sections): Handle binaries containing
	corrupt version information.
	(process_symbol_table): Stop processing a symbol's version
	information if it could not be read in.

	(get_data): Add comment describing the function.
	(process_section_headers): Set dynamic_strings_length to 0 if the
	dynamic strings could not be read in.
	(process_dynamic_section): Likewise.
	(process_section_groups): Stop processing the group information if
	the data could not be read in.
	(hppa_processs_unwind): Assert that there is only one string table
	in the file.
	(arm_process_unwind): Likewise.
	(ia64_process_unwind): Likewise.
	Set the size of the unwind auxillary information to 0 if the data
	could not be read.
	(load_specific_debug_section): Handle a failure to read in the
	section.
	(process_mips_specific): Stop display of the PLT GOT section if it
	could not be read in.