arrow

MINOR: [C++] Always call cmake message() with explicit mode (#13237)

`message()` without mode is not preceded with `--`, and may be printed
out of order.

E.g., `Using ld linker` is not aligned with other messages.
```
-- Performing Test CXX_SUPPORTS_AVX512 - Success
-- Arrow build warning level: CHECKIN
Using ld linker
-- Configured for RELWITHDEBINFO build ...
```

Authored-by: Yibo Cai <yibo.cai@arm.com>
Signed-off-by: Sutou Kouhei <kou@clear-code.com>