PATCH: Use R*_LP on pointers in __longjmp.S and setjmp.S

[Roland McGrath]

>  	movq (JB_RBP*8)(%rdi),%r9
>  	movq (JB_PC*8)(%rdi),%rdx

It saves a byte to make this:

	mov (JB_PC*8)(%rdi),%RDX_LP

It makes no difference but is consistent to do it for the JB_RSP and JB_RBP
loads too, so might as well.


Thanks,
Roland