strace: upgrade 6.5 -> 6.6

strace: upgrade 6.5 -> 6.6

Update the COPYING checksum; only the copyright date changed.

Noteworthy changes in strace 6.6 (2023-10-31)
=============================================

* Improvements
  * Implemented --kill-on-exit option that instructs the tracer to set
    PTRACE_O_EXITKILL option to all tracee processes and not to detach them
    on cleanup so they will not be left running after the tracer exit.
  * Implemented automatic activation of --kill-on-exit option when
    --seccomp-bpf is enabled and -p/--attach option is not used.
  * Implemented decoding of map_shadow_stack syscall.
  * Implemented decoding of FSCONFIG_CMD_CREATE_EXCL fsconfig command.
  * Implemented decoding of IFLA_BRPORT_BACKUP_NHID netlink attribute.
  * Implemented decoding of SECCOMP_IOCTL_NOTIF_SET_FLAGS ioctl.
  * Implemented decoding of UFFDIO_CONTINUE, UFFDIO_POISON, and
    UFFDIO_WRITEPROTECT ioctls.
  * Updated lists of ARCH_*, BPF_*, DEVCONF_*, IORING_*, KEXEC_*, MAP_*, NT_*,
    PTRACE_*, QFMT_*, SEGV_*, UFFD_*, V4L2_*, and XDP_* constants.
  * Updated lists of ioctl commands from Linux 6.6.

ptest-runner results on qemux86-64/kvm with qemuparms="-m 1024 -smp 4":
============================================================================
Testsuite summary for strace 6.6
============================================================================
============================================================================

Signed-off-by: Randy MacLeod <Randy.MacLeod@windriver.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>