make dpkg should only build binary packages

make dpkg should only build binary packages

The source package we would get by running dpkg-buildpackage in the
source tree without further preparation is basically useless, since
it's a native source package for a non-native package and will contain
any random dirty cruft in the current source tree.  Since the purpose
of make dpkg is to provide quick Debian packages for testing purposes,
only build the *.deb files and don't bother to build the source
package.

Change-Id: Ia2643c7e8936b15e3447df589ed0236438b8341e
Reviewed-on: http://gerrit.openafs.org/2427
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>