Fix sparc64 crashes with LD_BIND_NOW and --enable-bind-now.

	[BZ #14376]
	* sysdeps/sparc/sparc64/dl-machine.h (elf_machine_rela): Do not
	pass reloc->r_addend in as the 'high' argument to
	sparc64_fixup_plt when handling R_SPARC_JMP_IREL relocations.