contrib/(C) exporter: fix debsources-foreach invocation
contrib/(C) exporter: fix debsources-foreach invocation

matthieucan/debsources,devoxel/debsources,oorestisime/debsources,zacchiro/debsources,Debian/debsources,oorestisime/debsources,zacchiro/debsources,matthieucan/debsources,oorestisime/debsources,Debian/debsources,Debian/debsources,matthieucan/debsources,devoxel/debsources,matthieucan/debsources,matthieucan/debsources,zacchiro/debsources,devoxel/debsources,zacchiro/debsources,oorestisime/debsources,devoxel/debsources,devoxel/debsources,zacchiro/debsources,Debian/debsources,Debian/debsources,oorestisime/debsources