Update the linux kernel for sysb/c to 4.9.10.

- We do not use latest 4.9.x because it relies on a new version of
  binutils, while older versions do not. (Note: we should be able to go
  a bit newer but I didn't bother testing >50 versions to figure this
  out).
- We do not use newer kernel versions because they require one or more
  of (new perl, new binutils, new make, new gcc, new bison, new tar).
- sysb and sysc are updated to use the SATA (libata) subsystem (aka sda)
  instead of IDE-emulating SATA subsystem (aka hda) which is now
  available to us.
- While theoretically according to docs 4.9 should work OOTB with our
  version of binutils this is not the case, so we have to do a bit of
  (interesting) patching. But this does not break anything.
- Thankfully serial support in 4.9 is not screwed over like it is in 2.6
  so we can revert to that.
- 4.9 has the linux-libre project at our disposal, instead of gNewSense.
  So we use this. Unfortunatley that takes forever because we have to
  use sed because our version of gawk is too old/buggy. :( I plan to
  introduce very shortly 1. parallelism 2. 'sysc snapshot' which will
  start from sysc to avoid this. I do not want to use linux-libre
  tarballs because they make modificiations directly from this script
  (aka not easily verifiable, use the source!) and this script allows
  for much greater flexibility.
- We compile the initramfs ahead-of-build using the in-tree cpio
  generator instead of also building cpio to use less packages. We do
  NOT build the initramfs into the kernel like 2.6 (unsupported).
- Oh and fix a kexec-tools checksum.

SHA256SUMS.sources

@@ -103,3 +103,6 @@ f694bee56099b8d72c3843d97e27f2306aa9946741e34a27391f6f6f19c7bcd0  util-linux-2.1
 203c93e004ac7ad0e50423ff54d89e40fa99f45b207b2b892a4d70211feebe05  kbd-1.15.tar.gz
 ff2bf7656c4d1c6fdda3b8bebb21f09153a736bcba169aaf65eab25fa113bf3a  automake-1.16.3.tar.xz
 3d991b33e604187c5881a0abc2e102d5b9776da5569640e73778f85d617242e7  make-3.82.tar.gz
+97ff15f9550c6e85c25173b3cf5c7e89a2d39fb923112f2c8bc2729cf64bf6d8  linux-4.9.10.tar.gz
+db316ba381e5a9916ace64acf822f0de70a724df06f73c18d79c5d16385a0cf1  deblob-4.9
+62912c9e999cc25c8cf494533d5bab8c22d9e0ee081649d3c05197b3a096aa3b  deblob-check