uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/tools/misc/grub/buggybios.patch

@@ -0,0 +1,11 @@
+Taken from: http://savannah.gnu.org/bugs/?func=detailitem&item_id=10433
+--- grub-0.95.orig/stage2/bios.c 2004-03-27 17:34:04.000000000 +0100
++++ grub-0.95/stage2/bios.c 2005-03-02 01:02:29.192582200 +0100
+@@ -147,6 +147,7 @@
+   grub_memset (&cdrp, 0, sizeof (cdrp));
+   cdrp.size = sizeof (cdrp) - sizeof (cdrp.dummy);
+   err = biosdisk_int13_extensions (0x4B01, drive, &cdrp);
++  err = 0; /* really ugly hack to circumvent faulty BIOS versions like Acer 292LMi */
+   if (! err && cdrp.drive_no == drive)
+     {
+        if ((cdrp.media_type & 0x0F) == 0)