acl: Enable largefile support by default

This ensures right flags are passed so enable it. Musl and decoupled
these APIs from _GNU_SOURCE and now are only available when
_LARGEFILE64_SOURCE macro is enabled

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>