tools headers: Update the copy of x86's mem{cpy,set}_64.S used in 'perf bench'

tools headers: Update the copy of x86's mem{cpy,set}_64.S used in 'perf bench'

This is to get the changes from:

  94ea9c05219518ef ("x86/headers: Replace #include <asm/export.h> with #include <linux/export.h>")
  10f4c9b9a33b7df0 ("x86/asm: Fix build of UML with KASAN")

That addresses these perf tools build warning:

  Warning: Kernel ABI header differences:
    diff -u tools/arch/x86/lib/memcpy_64.S arch/x86/lib/memcpy_64.S
    diff -u tools/arch/x86/lib/memset_64.S arch/x86/lib/memset_64.S

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Vincent Whitchurch <vincent.whitchurch@axis.com>
Link: https://lore.kernel.org/lkml/ZbkIKpKdNqOFdMwJ@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>