Bug#688765: FTBFS if built twice in a row

[Helmut Grohne]

Source: libpri
Version: 1.4.12-2
Severity: serious
Justification: fails to build from source

The upstream Makefile creates a version.c which is not removed
during (make) clean. Thus the second attempt to build the package
fails with a message from dpkg-source saying that local changes
(to version.c) were detected and the build is aborted. Since the
package uses dh, the fix is as simple as:

echo version.c >> debian/clean

Thanks

Helmut