Staging: lustre: __aligned(size) is preferred over __attribute__((aligned(size)))

This patch fixes the checkpatch.pl warning in the drivers/staging/lustre/include/linux/libcfs/libcfs_kernelcomm.h

Signed-off-by: Dilek Uzulmez <dilekuzulmez@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>