trivial build products should not be in source package

[Peter Hurley]

Packaging trivial build products such as shell/cc-shell-marshal.{c,h} unnecessarily complicates building from source, __especially__ since debian/patches/60_ubuntu_nav_bar.patch renders the originals invalid anyway.

Consider the typical approach for shadowing the package with additional patches:
$ apt-get source gnome-control-center
$ cd gnome-control-center-3.4.2
$ git init
$ git add .
$ git commit -m "Base package"
$ dpkg-buildpackage -b -rfakeroot -us -uc
..... everything builds fine, now cleanup and rebuild .....
$ git reset --hard HEAD
$ git clean -xdf
$ dpkg-buildpackage -b -rfakeroot -us -uc
..... build fails because trivial build products have current datetime so won't be rebuilt :(