linux-libre-4.9 was updated from 4.9.18 to 4.9.19

The downloaded tarball hashes to
1864sbq2r5y7fi26hla9k4avzs6sprkpgwpq8gi0sr39i58z6hnz

but the defined package has
19x6hasx7pvrjj08vy8mhylx1s63j3dwxzgqh4k18jwzjfkv3p3g

so if you try to build it, it will fail claiming that the hash is different