64-byte-align the test functions so they appear on different cache lines.

64-byte-align the test functions so they appear on different cache lines.
It doesn't seem to make much of a difference through for some unknown
reason nop1() seems to have slightly lower overhead then nop2().

    dhcp62# /tmp/call3
    call nop() function through function pointer in loop
    call3/nop1-1 10.508s 1000000000 loops =  0.011uS/loop
    call3/nop1-2 14.610s 1000000000 loops =  0.015uS/loop
    call3/nop2-2  7.046s 1000000000 loops =  0.007uS/loop