Fixed PR17178 by updating syscall.[gs]etsockopt probes.

Fixed PR17178 by updating syscall.[gs]etsockopt probes.

* tapset/linux/syscalls.stp (syscall.getsockopt): Fixed to handle inlined
  calls to compat_sys_getsockopt() by decoding
  socketcall()/compat_sys_socketcall() calls instead.
* tapset/linux/nd_syscalls.stp: Ditto.
* tapset/linux/syscalls2.stp (syscall.compat_select): Fixed sign handling
  of 'n' argument.
  (syscall.setsockopt): Fixed to handle inlined calls to
  compat_sys_setsockopt() by decoding socketcall()/compat_sys_socketcall()
  instead.
* tapset/linux/nd_syscalls2.stp (nd_syscall.setsockopt): Fixed to handle
  inlined calls to compat_sys_setsockopt() by decoding
  socketcall()/compat_sys_socketcall() instead.