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.

rootfs.py

@@ -32,7 +32,7 @@ def create_configuration_file(args):
     with open(config_path, "w") as config:
         config.write("FORCE_TIMESTAMPS=" + str(args.force_timestamps) + "\n")
         config.write("CHROOT=" + str(args.chroot) + "\n")
-        config.write("DISK=hda1\n")
+        config.write("DISK=sda1\n")
 
 def main():
     """
@@ -128,7 +128,8 @@ print(shutil.which('chroot'))
             '-hda', system_c.dev_name,
             '-kernel', args.kernel,
             '-initrd', system_a.initramfs_path,
-            '-display', 'curses')
+            '-nographic',
+            '-append', 'console=ttyS0')
 
 if __name__ == "__main__":
     main()