Update ACL pin to bef7fa27b0d231a8649952f60808132d109b6345
Update ACL pin to bef7fa27b0d231a8649952f60808132d109b6345

Signed-off-by: Nikhil Raj <70dde441576cd8b053dd4c3a595f3f0b9c7a63a3@arm.com>
Change-Id: I842bb25a5c4dfda7e195e71af41e829bc6c5ea21

ARM-software/armnn,ARM-software/armnn,ARM-software/armnn