readelf reloc range check

readelf reloc range check

A fuzzed object file hit this sanitizer error.
readelf.c:16764:9: runtime error: pointer index expression with base
0x6dd4491e1590 overflowed to 0xe7af96d4491e17a1

The same could occur in any of the IN_RANGE reloc checks, where the
reloc address is calculated as "start + r_offset" then compared
against "start" and "end".  So don't do that.  Compare r_offset
against the memory size, first.

	* readelf.c (IN_RANGE): Delete.
	(in_range): New inline funcion.
	(target_specific_reloc_handling): Replace "end" param with
	"size".  Update uses.  Replace IN_RANGE with in_range.
	(apply_relocations): Delete "end" variable.  Update
	target_specific_reloc_handling calls and replace IN_RANGE.
	Avoid pointer overflow.