selftests: harness: fix printing of mismatch values in __EXPECT()

selftests: harness: fix printing of mismatch values in __EXPECT()

intptr_t and uintptr_t are not big enough types on 32-bit architectures
when printing 64-bit values, resulting to the following incorrect
diagnostic output:

  # get_syscall_info.c:209:get_syscall_info:Expected exp_args[2] (3134324433) == info.entry.args[1] (3134324433)

Replace intptr_t and uintptr_t with intmax_t and uintmax_t, respectively.
With this fix, the same test produces more usable diagnostic output:

  # get_syscall_info.c:209:get_syscall_info:Expected exp_args[2] (3134324433) == info.entry.args[1] (18446744072548908753)

Link: https://lore.kernel.org/r/20250108170757.GA6723@strace.io
Fixes: b5bb6d3068ea ("selftests/seccomp: fix 32-bit build warnings")
Signed-off-by: Dmitry V. Levin <ldv@strace.io>
Reviewed-by: Kees Cook <kees@kernel.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>