This was previously available in 6c62da4803 but was then removed
in cb7fcbe1ef. Add it back since it will be helpful if the user
wants to hide the crosstool-NG version in the pkgversion.
To get the new version, a defconfig from "ct-ng savedefconfig" or
"ct-ng oldconfig" must be used in combination with "ct-ng menuconfig"
or "ct-ng nconfig".
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>