Fix integer overflow problems when reading an ELF binary with corrupt augmentation...

Fix integer overflow problems when reading an ELF binary with corrupt augmentation data.

	PR 22386
	* dwarf.c (read_cie): Use bfd_size_type for
	augmentation_data_len.
	(display_augmentation_data): New function.
	(display_debug_frames): Use it.
	Check for integer overflow when testing augmentation_data_len.