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.

sysc.py

@@ -47,10 +47,10 @@ class SysC(SysGeneral):
         if not self.chroot:
             # Create + mount a disk for QEMU to use
             disk_path = os.path.join(self.tmp_dir, 'disk.img')
-            self.dev_name = create_disk(disk_path, "msdos", "ext2", '8G')
+            self.dev_name = create_disk(disk_path, "msdos", "ext4", '8G')
             self.rootfs_dir = os.path.join(self.tmp_dir, 'mnt')
             os.mkdir(self.rootfs_dir)
-            mount(self.dev_name + "p1", self.rootfs_dir, 'ext2')
+            mount(self.dev_name + "p1", self.rootfs_dir, 'ext4')
             # Use chown to allow executing user to access it
             run('sudo', 'chown', getpass.getuser(), self.dev_name)
             run('sudo', 'chown', getpass.getuser(), self.rootfs_dir)
@@ -120,9 +120,6 @@ class SysC(SysGeneral):
         self.get_file(["https://git.savannah.gnu.org/cgit/coreutils.git/snapshot/coreutils-8.32.tar.gz",
                        "https://git.savannah.gnu.org/cgit/gnulib.git/snapshot/gnulib-d279bc.tar.gz"])
 
-        # make 4.2.1
-        self.get_file("https://ftp.gnu.org/gnu/make/make-4.2.1.tar.gz")
-
         # gmp 6.2.1
         self.get_file("https://mirrors.kernel.org/gnu/gmp/gmp-6.2.1.tar.xz")