Moved more hacks into functions out of the way.
Documented sed scripts a little better.
Fixed the problem where the toolchain incorrectly defines MB_LEN_MAX as 1.
Updated linux from version 3.11 to 3.12.2
Updated binutils from version 2.23.2 to 2.24
Updated gmp from version 5.1.2 to 5.1.3
Updated gcc from version 4.8.1 to 4.8.2
Updated file from version 5.14 to 5.16
Updated tar from version 1.26 to 1.27.1
Updated check from version 0.9.10 to 0.9.11
Updated kbd from version 2.0.0 to 2.0.1
Updated util-linux from version 2.23.2 to 2.24
Updated grep from version 2.14 to 2.15
Updated make from version 3.81 to 4.0
Updated libnl from version 3.2.22 to 3.2.23

As always with major version changes this probably breaks building from non GNU+Linux buildhosts.