Bug#752364: uupdate: support multiple source archives

[Osamu Aoki]

Hi,

Adding all the packaging format within uupdate in this coding style with
future extendibility is not an easy task.

dpkg (dpkg-source etc.) is written in more OO modularized style and
support many formats.

In stead of re-implimenting this complicated task, I thought using
dpkg-source -b maybe an idea.  In order to use this, we need to have
minimal set of files.


Real upstream source with correct names:
 * fritzing_0.9.2b+dfsg.orig-parts.tar.gz
 * fritzing_0.9.2b+dfsg.orig.tar.gz

Empty content file to fool error check:
 * fritzing_0.9.2b+dfsg-1.debian.tar.xz

Fake simplified DSC file:
----fritzing_0.9.2b+dfsg-1.dsc
Format: 3.0 (quilt)
Source: fritzing
Version: 0.9.2b+dfsg-1
Files:
 11111111111111111111111111111111 1 fritzing_0.9.2b+dfsg.orig-parts.tar.gz
 22222222222222222222222222222222 9 fritzing_0.9.2b+dfsg.orig.tar.gz
 33333333333333333333333333333333 1 fritzing_0.9.2b+dfsg-1.debian.tar.xz
-----------

Yes, hush and size can be bogus but must be there to fool error checking.
Format can be anything reasonable matching files.

Then:
 $ dpkg-source --debug --no-copy --no-check --skip-debianization -x fritzing_0.9.2b+dfsg-1.dsc

This should unpack nicely.

This approach should be simpler to impliment and maintain.

Osamu