include column.exe from util-linux package

[jankatins]

The git-extras package currently has the problem that some of the commands depend on column, which is included in msys util-linux package. Unfortunately, it is not included in the git for windows install and you have to copy the file from a msys install. Would it be possible to include column.exe?

https://github.com/tj/git-extras/blob/master/Installation.md

Last, to use git-line-summary, git-summary and git-ignore-io, you need to copy column.exe from a msys2 installation from folder-your-msys2-installed/usr/bin to folder-your-git-installed/usr/bin .

[jankatins]

I can send a PR for this against git-for-windows/build-extra by adding that as a new exception in https://github.com/git-for-windows/build-extra/blob/master/make-file-list.sh#L103

[dscho]

Sure, a PR would be appreciated, especially with a kick-ass commit message (including the fact that column.exe weighs only 25K and depends only on msys-2.0.dll and msys-intl-8.dll, both of which we ship already).

[jankatins]

@dscho: done, here: git-for-windows/build-extra#92