PR16207 partial fix: Fix the 'dup' [nd_]syscall.exp tests on rawhide.

PR16207 partial fix: Fix the 'dup' [nd_]syscall.exp tests on rawhide.

* tapset/linux/syscalls.stp: Split the syscall.dup2 probe into
  syscall.dup2 and syscall.dup3.
* tapset/linux/nd_syscalls.stp: Split the nd_syscall.dup2 probe into
  nd_syscall.dup2 and nd_syscall.dup3.
* runtime/linux/compat_unistd.h: Added the __NR_compat_dup3 define.
* testsuite/buildok/syscalls-detailed.stp: Added dup3 test.
* testsuite/buildok/nd_syscalls-detailed.stp: Ditto.