Bug#516625: pbuilder: pdebuild signs wrong .changes when building with --arch=i386 on amd64

[Todd A. Jacobs]

I'm experiencing the same problem here. As others have mentioned, the
use case where this becomes a problem is when attempting to build both
amd64 and i386 packages on the same box.

For example:

    DIST=sid ARCH=amd64 pdebuild --auto-debsign --buildresult /tmp/$(basename $PWD) --debsign-k 0xD1F37E2D && DIST=sid ARCH=i386 pdebuild --auto-debsign --buildresult /tmp/$(basename $PWD) --debsign-k 0xD1F37E2D --debbuildopts "-B -i" -- --basetgz /var/cache/pbuilder/sid-i386-base.tgz

results in only the *_amd64.changes file being signed, leaving the
*_i386.changes file unsigned.

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