We just want to keep at least the directory stamps around in both cases
were someone works with git (git-svn) or svn. Thus don't distribute
configration in various .gitingore and use method used already by other
various projects with a .keep file instead.

Move back Guido's addition of stamps to .gitignore

Thanks: Guido Günther <agx@sigxcpu.org>

git-svn-id: svn+ssh://svn.debian.org/svn/secure-testing@58139 e39458fd-73e7-0310-bf30-c45bca0a0e42